Test
Option (c) is the correct answer. A decomposition reaction is a reaction in which reactants break down into simpler products. Here, silver chloride is the substance that can be decomposed by the...
Option (d) is the correct response. The food we eat is digested and converted into energy during digestion. Carbohydrate-rich foods are broken down into glucose, which then combines with oxygen to...
![\[\mathbf{4M}\text{ }+\text{ }\mathbf{3}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }\mathbf{2}{{\mathbf{M}}_{\mathbf{2}}}{{\mathbf{O}}_{\mathbf{3}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-b55903fe466d8c12a229da84a4a44476_l3.png "Rendered by QuickLaTeX.com")
Option (d) is the correct response. Metal combines with oxygen to produce a single compound in the above reaction. This is a type of combination reaction, and since oxygen is added, thus it is an...
![\[\left( \mathbf{a} \right)\text{ }\mathbf{Ba}{{(\mathbf{N}{{\mathbf{O}}_{\mathbf{3}}})}_{\mathbf{2}}}\mathbf{solution}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-50da9bbc9460443f2e88d01ecb83dbc3_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{b} \right)\text{ }\mathbf{KN}{{\mathbf{O}}_{\mathbf{3}}}~\mathbf{solution}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-b0c35f69d350ff362bf0b0da57705207_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{c} \right)\mathbf{AgN}{{\mathbf{O}}_{\mathbf{3}}}\mathbf{solution}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-a1419bea63bda4ead8c43a88602a7240_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{d} \right)\text{ }\mathbf{Mg}{{(\mathbf{N}{{\mathbf{O}}_{\mathbf{3}}})}_{\mathbf{2}}}~\mathbf{solution}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-08e89344a0a4ccac9e6363e81f42a6d7_l3.png "Rendered by QuickLaTeX.com")
Option (c) is the correct response. When we add common salt to silver nitrate, a precipitation reaction occurs to give a white precipitate.
Option (c) is the correct answer. When dilute sulphuric acid reacts with barium chloride, barium sulfate is produced along with HCl gas. The resulting barium sulfate is a white, insoluble precipitate.
Option (c) is the correct response. Food items packed in plastic bags in a nitrogen gas atmosphere do not get spoiled since nitrogen is an inert gas that does not react with the items. This is done...
Option (c) is the correct response. Corrosion occurs when iron metal combines with water and oxygen to generate hydrated oxide. This is a combination reaction and also an oxidation reaction since...
Option (a) is the correct response. Redox reactions involve both reduction and oxidation, with reduction involving the addition of hydrogen and oxidation involving the removal of hydrogen.
Option (c) is the right answer. The process of removing oxygen from a substance and replacing it with hydrogen is known as reduction. It occurs when the rate of atom oxidation drops.
(a) When barium chloride solution is mixed with sodium sulphate solution, a white barium sulphate precipitate forms along with the sodium chloride solution. Na2SO4 + BaCl2 → BaSO4 + 2NaCl (c) Solid...
In the Modern Periodic Table, the element calcium has an atomic number 20, so it has 2, 8, 8, 2 electronic configurations. Therefore, this two valance electron containing element is identical to the...
In the Modern Periodic Table, the electronic configuration of an element determines the number of valence electrons whereas the position of the atom is determined by the valence electrons.
Nitrogen: Atomic number - 7 Electronic configuration - 1s2 2s2 2p3 Nitrogen: Atomic number - 15 Electronic configuration - 1s2 2s2 2p6 3s2 3p3 The number of shell increases in the periodic table...
Group 16 Group 17 - - - A - - B C (a) State whether A is a metal or non-metal. (b) State whether C is more reactive or less reactive than A. (c) Will C be larger or smaller in size than B?...
(a)The element is Chlorine (Cl) and the atomic number of chlorine is 17. (b) The atom with the electronic configuration of 2, 8, 7 which is the chlorine is chemically identical to Fluorine (F) which...
(a) All the elements are in the same boron column (group 13). Thus, they have three electrons in their valence shells. Besides, non-metallic boron, all other elements (i.e., aluminum, gallium,...
(a) Neon (Ne) has two shells in which both are completely filled with electrons. (b) Magnesium (Mg) has the electronic configuration 2, 8, 2. (c) Silicon (Si) has a total of three shells, with four...
Identification: Element X - Magnesium (Mg) containing valency of 2. Explanation: When Mg is combined with chloride (Cl), it forms Magnesium Chloride (MgCl2).
Correct Answer: (c) The atoms lose their electrons more easily Explanation: Atoms do not lose their electrons easily because as we move from left to right across the periodic table, the non-metallic...
The elements that are expected to have the most metallic character are Be and Ga. The tendency to lose electrons is greater in Ga than the Be as the size of Ga is bigger. Thus, the element Ga have...
The metals among the first ten elements in the modern periodic table are, Lithium Beryllium
(a) Lithium, sodium, potassium are the metals that are unstable because of the unfilled outermost shells. This is the reason that they react with water in order to release hydrogen and these metals...
Lithium (Li), Sodium (Na) and potassium (k) are the three elements that have only one electron in their outermost shells. Magnesium (Mg) and Calcium (Ca) are the two elements that contains...
I think that the elements Calcium and Beryllium are expected to show chemical reactions that are similar to the element magnesium as these elements belong to the same group having 2 valence...
The Modern periodic table is arranged in order of their atomic number. This removes inconsistencies in relation to certain pairs of the elements present in the Mendeleev’s periodic table. The atomic...
The noble gases have been classified as separate group because of their inert nature as they are also called as inert gases. Noble gases are present in low concentration in our atmosphere. They are...
Mendeleev focused on a variety of chemicals made up of elements containing Hydrogen and Oxygen. Among the material, he saw the interrelationships between the mass of many atoms of various elements...
The elements that are left by the Mendeleev’s Periodic Table besides gallium are, Germanium Scandium
According to the Mendeleev’s Periodic Table, Potassium (K) belongs to group IA with a valency of 1. Formula - K2O Carbon (C) belongs to group IV A with a valency of 4. Formula - C2O4 or CO2 Aluminum...
Limitations of Newlands’ Law of Octaves: Newlands Octave law applies only to the elements till Calcium. Newland estimates that there are a total of 56 elements in nature and that there are no more...
Mendeleev’s Periodic Table Modern Periodic Table In the Mendeleev’s Periodic Table, the arrangement of the elements are according to the increasing order of the element’s atomic mass. In the Modern...
Limitations of Döbereiner’s classification: They do not work at elements which have very low or high mass. All elements could not fit into Dobereiner's traids. As the methods of calculating the...
There is a lot of dirt and contaminants mixed with water, and most of all the impurities do not dissolve in the water. Soap molecules are a mixture of salts such as sodium or potassium. Molecules...
The Bromine Water Testing is used to distinguish between unsaturated chemicals such as alkenes and alkynes and saturated chemicals. For this purpose, bromine is used in the form of water. The...
The hydrocarbons that undergo addition reactions are: C3H6 C2H2
Hydrogenation is the process or chemical reaction between hydrogen and other chemicals. It is usually done in the presence of catalysts like for example nickel, palladium or platinum. Hydrogenation...
When soap is dissolved in water, due to the formation of alkaline NaOH or KOH, the solution is also alkaline. The solution turns red litmus into blue, but in soap solution, blue litmus do not change...
A scrum is produced by a reaction of hard water with soap. The calcium and magnesium present in hard water form an insoluble white precipitate (scrum).
Carbon and its compounds used as fuel for many applications because they have high calorie values and provide a lot of energy. Most carbon dioxide emits a lot of heat and light when burned in the...
Micelle formation occurs due to contaminated particles in water and fresh water. There are two departments involved: one is pure water and the other is impurities. Soap also has two modes (organic...
Ethanol Ethanoic acid Ethanol do not react with sodium hydrogen carbonate Ethanoic acid reacts with sodium hydrogen carbonate Ethanol has a good smell and a burning taste Ethanoic acid has a vinegar...
A homologous series is a series of chemical compounds having same functional group, general formula and chemical properties. As there is a change in physical structures, we can say that there will...
(a) Electron dot structure of ethanoic acid: (b) Electron dot structure of H2S: (c) Electron dot structure of propanone: (d) Electron dot structure of F2:
Carbon cannot lose four electrons or gain four electrons as these processes make the system unstable due to the need for additional energy. CH3Cl therefore eliminates its octet suspension by sharing...
Correct Answer: (b) the fuel is not burning completely Explanation: While cooking, if the bottom of the vessel is dark outside it shows that the fuel is not completely burning.
Correct Answer: (c) ketone Explanation: Butanone, also known as methyl ethyl ketone, is an organic chemical compound manufactured on a large scale, but only happens in the environment by tracing.
Correct Answer: (b) 7 covalent bonds Explanation: Ethane is the simplest hydrocarbon containing a single carbon-carbon bond. The second most important source of natural gas, it is also dispersed in...
Usually, agitation is necessary to obtain clean clothes such as agitation aid soap micelles to hold oil, grease or any other impurities to be removed. When the clothes are agitated or beaten, the...
It is impossible to check whether the water is hard by using a detergent because the detergents are made of ammonium salts or long carboxylic acid sulphonates. Unlike soaps do not work with calcium...
Oxidising agents are compounds that remove Hydrogen or add oxygen to a mixture. Eg: halogen, potassium nitrate, and nitric acid.
In reaction with Sodium Carbonate, Carboxylic acid produces carbon dioxide gas which converts lime water into a milky form and alcohol does not give this reaction. This test can be used to separate...
The mixture of oxygen and ethyne is heated instead of a mixture of ethyne and air because heat production is very important in heating metals. When oxygen and ethyne burn, they completely burn to...
The conversion of ethanol to ethanoic acid involves the removal of the Hydrogen atom and the addition of oxygen (oxidation reaction). In the first step, the Hydrogen molecule is removed from ethanol...
1. CH3—CH2—Br 2. 3. Answers: 1. Bromoethane 2. Methanal or Formaldehyde 3. 1 – Hexyne
(i) Ethanoic acid: (ii) Bromopentane: (iii) Butanone: (iv) Hexanal:
Formula and Electron dot structure of cyclopentane:
Carbon has six electrons in valence which is actually the highest number of valency. The Covalent bond occurs easily with carbon atoms and many others such as oxygen, chlorine, nitrogen, sulfur,...
1. n-pentane: 2. 2-methylbutane: 3. 2, 2-dimethylpropane:
Electron dot structure of a molecule of Sulphur:
Electron dot structure of carbon dioxide (CO2):
(a)Rancidity is the result of the slow oxidation of oil and fat found in food products, which produces a bad odour and taste. When fats and oils oxidise, the food turns rancid, which affects the...
Corrosion is a natural process that gradually degrades things in the environment through chemical or electrochemical reactions. Corrosion happens when the majority of all of the atoms on a metal...
When a strip of zinc metal is immersed in copper sulphate solution, zinc sulphate solution and copper are obtained. (a) The chemical equation for the reaction mentioned above is as follows:-...
When silver chloride is exposed to light, it decomposes into silver metal and chlorine gas, which is a photolytic breakdown reaction. The chemical equation for this reaction is as follows:- 2AgCl(s)...
When silver nitrate solution is added to sodium chloride solution, a white silver chloride precipitate forms along with the sodium nitrate solution. (a) The chemical equation for the reaction is:-...
(a) Magnesium sulphate solution and copper metal are produced when a piece of iron metal is immersed in a copper sulphate solution. This is an example of a displacement reaction. CuSO4 + Fe →...
(a) Decomposition reactions are reactions that split or break substances into two simpler components. When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide. This is...
(a) A displacement reaction occurs when one active element removes a less reactive ingredient from a salt solution. 2KI + Cl2 → 2KCl + I2 b) A double displacement reaction occurs when two ionic...
Oxidation is the removal of hydrogen and reduction is the addition of hydrogen. This is demonstrated by an example as foloows: Fe2O3 + 3CO → 2Fe + 3CO2 In the reaction above, Fe got reduced while...
(a) Oxidation is the addition of oxygen while reduction is the removal of oxygen. H2S + Cl2→ S + 2HCl In the reaction shown above, hydrogen is removed from hydrogen sulphide, so it is an oxidation...
(a) A displacement reaction occurs when a more reactive ingredient displaces a less reactive element out of its compound. The displacement reaction involves both metals and non-metals. An example of...
(a) 2Cu + O2 → 2CuO (in the presence of heat) Copper oxide is formed when copper reacts with oxygen in an oxidation-reduction reaction. (b) CuO + H2→ Cu + H2O Dihydrogen oxide is formed when...
ZnO + C → Zn + CO (i) An oxidizing agent is a reactant that gains electrons and undergoes reduction during a redox reaction. In the reaction shown above, the oxidizing agent is zinc oxide as it...
A decomposition reaction occurs when a substance is broken down or split into two or more components. They are divided into three categories. Thermal decomposition, electrolytic decomposition, and...
(a) Ferrous sulphate crystals are green in colour but their colour changes to white when heated. This is because the water in the crystals evaporates and anhydrous ferrous sulphate is produced,...
(a) An endothermic process is one in which heat is absorbed during the reaction. For example, burning carbon in the presence of oxygen produces carbon dioxide and releases a significant quantity of...
A redox reaction is a reaction when both oxidation and reduction take place simultaneously. An example for a redox reaction is as follows:- SO3(aq) + MnO4(aq) → SO4(aq) + Mn Here, Sulphur trioxide...
Oxidation is the process of losing an electron by an atom. Alternatively, oxygen can be added to a substance to raise the fraction of oxygen in its molecule. Oxidation can even be accomplished...
Answer: (a) Oxidation; reduction. (b) Reduction; oxidation. (c) Rancidity.
![\[\mathbf{S}{{\mathbf{O}}_{\mathbf{2}}}~+\text{ }\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{S}\text{ }\to \text{ }\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\text{ }+\mathbf{3S}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-f253585babb374c2b6e61729cf8a446f_l3.png "Rendered by QuickLaTeX.com")
SO2 + 2H2S → 2H2O +3S In the reaction above, H2S got oxidized as Hydrogen was removed from the molecule while SO2 got reduced because Oxygen was removed.
![\[{{\mathbf{H}}_{\mathbf{2}}}\mathbf{S}\text{ }+\mathbf{C}{{\mathbf{l}}_{\mathbf{2}}}\to \text{ }\mathbf{S}\text{ }+\mathbf{2HCl}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-5a825f6d792d8b4bee77b84ccd034b34_l3.png "Rendered by QuickLaTeX.com")
H2S is oxidized in the above reaction as Hydrogen is being removed from H2S to release sulphur.
![\[\mathbf{PbS}\left( \mathbf{s} \right)\text{ }+\text{ }\mathbf{4}{{\mathbf{H}}_{\mathbf{2}}}{{\mathbf{O}}_{\mathbf{2}}}\left( \mathbf{aq} \right)\text{ }\to \text{ }\mathbf{PbS}{{\mathbf{O}}_{\mathbf{4}}}\left( \mathbf{s} \right)\text{ }+\mathbf{4}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\left( \mathbf{l} \right)\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-9da3bbdbcec1b52f5114c4f9aade8a63_l3.png "Rendered by QuickLaTeX.com")
(a) H2O2 is reduced. (b) PbS is oxidised.
![\[\left( \mathbf{a} \right)\text{ }\mathbf{CaO}\text{ }+\text{ }\mathbf{C}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }\mathbf{CaC}{{\mathbf{O}}_{\mathbf{3}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-0a64bd62fb54bbd0edf1b63b6683ee24_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{b} \right)\text{ }\mathbf{2Na}\text{ }+\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\text{ }\to \text{ }\mathbf{2NaOH}\text{ }+{{\mathbf{H}}_{\mathbf{2}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-ca02eab857f32a5212e1bec9e28dde03_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{c} \right)\text{ }\mathbf{Mg}\text{ }+\text{ }\mathbf{CuS}{{\mathbf{O}}_{\mathbf{4}}}\to \text{ }\mathbf{MgS}{{\mathbf{O}}_{\mathbf{4}}}~+\text{ }\mathbf{Cu}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-1fc4d1026bbc1af1b8dabbefee1e3766_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{d} \right)\text{ }\mathbf{N}{{\mathbf{H}}_{\mathbf{4}}}\mathbf{N}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }{{\mathbf{N}}_{\mathbf{2}}}~+\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-ec63045a06b69bdeacca721fae9d3a06_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{e} \right)\text{ }\mathbf{CuS}{{\mathbf{O}}_{\mathbf{4}}}~+\text{ }\mathbf{2NaOH}\text{ }\to \mathbf{Cu}{{\left( \mathbf{OH} \right)}_{\mathbf{2}}}~+\mathbf{N}{{\mathbf{a}}_{\mathbf{2}}}\mathbf{S}{{\mathbf{O}}_{\mathbf{4}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-66adb56ae15b498d389cdc9659a64a2f_l3.png "Rendered by QuickLaTeX.com")
(a) Combination reaction, since calcium oxide combines with carbon dioxide to calcium carbonate. (b) Displacement reaction, since sodium replaces oxygen to give sodium hydroxide. (c) Displacement...
![\[\left( \mathbf{a} \right)\text{ }\mathbf{C}{{\mathbf{l}}_{\mathbf{2}~}}+\mathbf{2KI}\text{ }\to \text{ }\mathbf{2KCl}\text{ }+{{\mathbf{I}}_{\mathbf{2}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-4dc4be4dcdc2a604694c564896fcc2aa_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{b} \right)\text{ }\mathbf{2K}\text{ }+\text{ }\mathbf{C}{{\mathbf{l}}_{\mathbf{2}~}}\to \text{ }\mathbf{2KCl}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-7c0994c2a89c00e7940167bc34f57534_l3.png "Rendered by QuickLaTeX.com")
(a) Displacement reaction, since Chlorine replaces Iodine to combine with POtassium to give Potassium chloride. (b) Combination reaction since Potassium and chloride combine to form two molecules of...
![\[\left( \mathbf{a} \right)\text{ }\mathbf{FeS}{{\mathbf{O}}_{\mathbf{4}}}\to \text{ }\mathbf{F}{{\mathbf{e}}_{\mathbf{2}}}{{\mathbf{O}}_{\mathbf{3}}}~+\text{ }\mathbf{S}{{\mathbf{O}}_{\mathbf{2}}}~+\text{ }\mathbf{S}{{\mathbf{O}}_{\mathbf{3}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-39a391e2efc0e61cf16f7278f41bd043_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{b} \right)\text{ }\mathbf{Pb}{{\left( \mathbf{N}{{\mathbf{O}}_{\mathbf{3}}} \right)}_{\mathbf{2}}}\left( \mathbf{s} \right)\text{ }\to \mathbf{PbO}\left( \mathbf{s} \right)\text{ }+\text{ }\mathbf{N}{{\mathbf{O}}_{\mathbf{2}}}\left( \mathbf{g} \right)\text{ }+\text{ }{{\mathbf{O}}_{\mathbf{2}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-d80c527fb417f074f02fec6a6299e69f_l3.png "Rendered by QuickLaTeX.com")
The given chemical equations have been balanced as follows: (a) 2FeSO4→ Fe2O3 + SO2 + SO3 In this reaction, Ferrous sulphate decomposes to give Ferric oxide. Sulphur dioxide and sulphur trioxide....
(i) Displacement reaction, since A replaces B to combine to C giving AC. (ii) Combination reaction since A and B combine to give a product C which is different from both the reactants. (iii)...
(a) Combination reaction, since magnesium reacts with oxygen in this reaction. (b) Decomposition reaction, since on heating limestone decomposes to give calcium oxide and carbon dioxide. (c)...
![\[\left( \mathbf{i} \right)\text{ }\mathbf{CaC}{{\mathbf{O}}_{\mathbf{3}}}\to ~\text{ }\mathbf{CaO}\text{ }+\text{ }\mathbf{C}{{\mathbf{O}}_{\mathbf{2}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-0c92930afac1ec5967f99a1ab56a8bb7_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{ii} \right)\text{ }\mathbf{CaO}\text{ }+\text{ }{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\text{ }\to ~\text{ }\mathbf{Ca}{{\left( \mathbf{OH} \right)}_{\mathbf{2}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-09a5e04c0d57cc97c3ed951a5fda53fb_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{iii} \right)\text{ }\mathbf{2FeS}{{\mathbf{O}}_{\mathbf{4}}}\to ~\mathbf{F}{{\mathbf{e}}_{\mathbf{2}}}{{\mathbf{O}}_{\mathbf{3}}}~+\text{ }\mathbf{S}{{\mathbf{O}}_{\mathbf{2}}}+\text{ }\mathbf{S}{{\mathbf{O}}_{\mathbf{3}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-8017c8e89d01e684bcf61c0f1de70693_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{iv} \right)\text{ }\mathbf{N}{{\mathbf{H}}_{\mathbf{4}}}\mathbf{Cl}\text{ }\to ~\text{ }\mathbf{N}{{\mathbf{H}}_{\mathbf{3}}}~+\text{ }\mathbf{HCl}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-dfa6e7a26dfa378a6a20c25533177fab_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{v} \right)\text{ }\mathbf{2Ca}\text{ }+\text{ }{{\mathbf{O}}_{\mathbf{2}}}\to ~\text{ }\mathbf{2CaO}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-4190dac4b3d24fa80d042d143aeff889_l3.png "Rendered by QuickLaTeX.com")
Answer: (i) Decomposition reaction, since calcium carbonate decomposes to gove calcium oxide and carbon dioxide in the reaction. (ii) Combination reaction, since Calcium oxide combines with water to...
Chemical equation for the recovery of silver from silver nitrate solution which involves displacement by copper metal is as follows:- 2AgNO3 (aq) + Cu (s) → Cu(NO3)2 (aq) + 2Ag (s)
(a) When heat is applied, a decomposition reaction occurs. 2Pb(NO3)2→ 2PbO + 4NO2 + O2 (b) Decomposition reaction in the presence of light 2AgCl → 2Ag + Cl2 (c) Decomposition reaction with the...
Antioxidants are utilized as preservatives in fat-containing foods to delay oxidation-induced rancidity. Antioxidants with longer half-lives, such as butylated hydroxytoluene (BHT) and butylated...
A decomposition reaction is used to extract several metals from their naturally occurring compounds such as oxide and chloride. Example: 2NaCl → 2Na + Cl2
(a) Electricity decomposes into hydrogen and oxygen gas when it passes through acidified water. 2H2 O → 2H2 + O2 (a) Thermal decomposition occurs when heat is applied. An example of thermal...
Nitrogen is used to flush the packet of chips or foods containing fats and oils. This is because nitrogen acts as an antioxidant. The food is packaged to keep it from getting oxidizing. When we pack...
Antioxidants are compounds that are added to fat and oil-containing foods to help slow down or prevent rancidity. Antioxidants can be nutrients as well as enzymes that are proteins that aid in...
Important uses of decomposition reactions:- (i) In photography, light is utilized to decompose silver chloride into silver and chlorine. This is an important use of decomposition reaction. (ii) This...
Antioxidants are compounds that are added to fat and oil-containing foods to help slow or prevent rancidity. Ascorbic acid and tocopherols are natural antioxidants, but butylated hydroxyanisole...
The term "rancidity" is used to describe the situation caused by the aerial oxidation of unsaturated fat found in food and other items. When fats and oils are exposed to air, light, or moisture,...
The balanced chemical equation for the reaction of zinc with silver nitrate to give zinc nitrate and silver. Zn + 2AgNO3 → Zn(NO3)2 + 2Ag
It is a displacement reaction. Because an iron nail dropped in the solution is more reactive than copper sulphate and displaces the molecules, the copper sulphate solution changes colour. As the...
Chemical reactions come in a variety of forms. The following are the names: (i) Combination reactions. (ii) Decomposition reaction. (iii) Displacement reaction. (iv) Double displacement reaction....
Our digestive system represents the decomposition reaction. It is nothing more than a chemical reaction in which the food we are eating is further broken down into digestible nutrients such as fats,...
(a) Gas A is Carbon dioxide, CO2 (b) B is Water, H2O (c) Sunlight is the environmental factor (d) Material D is Chlorophyll; it is found in green leaves of plants which provide pigmentation (e)...
(a) Compound A is Potassium chlorate, KClO3 (b) Compound B is Potassium chloride, KCl (c) Gas C is Oxygen, O2 (d) X is Manganese dioxide, MnO2; Manganese dioxide is used as a catalyst in order to...
(a) X= Carbon monoxide gas (CO); Y= Hydrogen gas (H2); Z = Methanol (CH3OH or CH4O) (b)CO(g) + 2H2(g) → CH3OH (l) Carbon monoxide when reacts with hydrogen gas under a pressure of 300atmosphere and...
(a) Sodium is the metal ( Na ) (b) Solution S is Sodium hydroxide solution (NaOH solution),It is alkaline. (c) Hydrogen, H2is the gas evolved (d) 2Na + 2H2O → 2NaOH + H2 (e) Reaction is...
(a) Metal could be Copper, Cu. (b) Copper sulphate, CuSO4, Blue colour. (c) The blue precipitate Y is Copper hydroxide, Cu(OH)2 (d) CuSO4 (aq) + 2NaOH (aq) → Cu(OH)2 (s) +...
(a) Magnesium, Mg because magnesium undergoes oxidation in the presence of oxygen. (b) Magnesium oxide, MgO (c) Oxygen (of air), O2 (d) Magnesium hydroxide, Mg(OH)2; Used as an antacid to relieve...
(a) Calcium carbonate (limestone), CaCO3 (b) Calcium oxide, CaO (c) Carbon dioxide, CO2 (d) Calcium hydroxide, Ca(OH)2; Lime water. (e) Calcium carbonate; Limestone and Marble.
(a) Zinc and Iron. (b) Dilute hydrochloric acid and dilute sulphuric acid. (c) Hydrogen. (d) Lighter than air. (e) Exothermic. (f) Suppose metal X is zinc (Zn) and acid Y is dilute hydrochloric acid...
(a) Fifty (b) Sixty (c) Seventy (d) Ninety Solution: Option (b) is the answer. Buckminsterfullerene has the formula C60 and is a kind of fullerene. It is made up of twenty hexagons and twelve...
(a) 2 (b) 5 (c) 3 (d) 4 Solution: Option (c) is the answer.
(a) Lithium (b) Charcoal (c) Lead (d) Graphite Solution: Option (d) is the answer.
(a) C4H10 (b) C5H12 (c) C3H8 (d) C6H14 Solution: Option (c) is the answer. Because there must be greater than or equal to 4 carbon atoms for chain isomerism to occur, propane does not display chain...
(a) Cyclobutane (b) Benzene (c) Butene (d) Hexene Solution: Option (b) is the answer. Benzene is a hydrocarbon that has alternate single and double bonds arranged in the form of a ring. Alternating...
(a) 200 (b) 198 (c) 202 (d) 196 Solution: Option (a) is the answer. Alkenes are made up of double bonds and have the formula CnH2n. The number of carbon atoms in its molecule is denoted by the...
(a) Twenty-five (b) Twenty four (c) Twenty-six (d) Twenty seven Solution: Option (b) is the answer. Saturated hydrocarbons with the general formula CnH2n+2 are known as alkanes. The number of...
(a) Sodium and silicon (b) Chlorine and carbon (c) Carbon and sodium (d) Silicon and carbon Solution: Option (d) is the answer. Silicon and Carbon both can bond with 4 other atoms to form long-chain...
(a) Two (b) Five (c) Three (d) Four Solution: Option (b) is the answer. Neopentane, commonly known as 2,2-dimethylpropane, is a five-carbon double-branched-chain alkane. At room temperature and...
(a) Diamond (b) Graphite (c) Cumene (d) Buckminsterfullerene Solution: Option (c) is the answer. Cumene (isopropylbenzene) is an aliphatic-substituted aromatic hydrocarbon. Crude oil and refined...
Answer: (a) Calcium oxide, CaO. (b) Calcium hydroxide, Ca(OH)2 (c) Lime water. (d) CaO + H2O → Ca(OH)2 (e) Change in temperature.
Answer: (a) Lead Nitrate (b) Lead Iodide (c) Formation of precipitate (d)Pb(NO3)2 (aq) + 2KI (aq) → PbI2 (s) + 2KNO3 (aq)
(a) Glucose (b) Urea (c) Uric acid (d) Vinegar Solution: Option (b) is the answer.
Answer: Option (b) is the correct response. When the mass of atoms of different elements in the reactants side equals the mass of atoms in the products side, the equations are balanced.
(a) Steel girders (b) Logs of woods (c) Marble slabs (d) Asbestos sheets Solution: Option (c) is the answer. Diamond is hard. Hence suitable for cutting marble slabs.
Answer: Option (c) is the correct response. As heat energy is emitted during respiration, it is an exothermic reaction that keeps our body temperature stable.
Answer: Option (d) is the correct response. This is responsible for the exothermic respiration reaction, in which glucose burns in oxygen to produce heat energy.
(a) 150 (b) 148 (c) 152 (d) 146 Solution: Option (b) is the answer. The number of hydrogen atoms in an alkyne molecule with 75 carbon atoms is 148. Alkynes have the generic formula CnH2n-2, where n...
Answer: Option (b) is the correct response. Nitrogen monoxide is formed when nitrogen and oxygen are heated to extremely high temperatures in an endothermic reaction.
(a) 24 (b) 25 (c) 26 (d) 28 Solution: Option (c) is the answer. CnH2n-2 is the general formula for unsaturated hydrocarbons containing a triple bond. The number of atoms in one molecule is denoted...
Answer: Option (c) is the correct response. The reaction between quicklime and water produces a greater amount of energy, making it an exothermic reaction.
(a) n-pentane (b) n-butane (c) Propane (d) Iso-butane Solution: Option (a) is the answer.
Answer: Option (a) is the correct response. The reaction of potassium dichromate with sulphur dioxide is characterised by a colour shift. By passing sulphur dioxide through acidified potassium...
Answer: Option (b) is the correct response. When purple-colored potassium permanganate reacts with citric acid, the colour changes from purple to colourless.
(a) C6H12 (b) C6H14 (c) C6H6 (d) C6H10 Solution: Option (c) is the answer.
Answer: Option (d) is the correct response. When lead nitrate reacts with potassium iodide, a yellow precipitate of lead iodide is formed.
(a) Protonation (b) Carbonation (c) Coronation (d) Catenation Solution: Option (d) is the answer. Catenation is the bonding of atoms of the same element into a series, known as a chain, in...
Answer: Option (d) is the correct response. Wax changes its physical state but not its characteristics when heated, therefore there is no chemical change but there is a physical change.
(a) 5 (b) 12 (c) 17 (d) 16 Solution: Option (d) is the answer. In pentane, each bond pair is a covalent bond.There are 16 single bonds in all.As a result, the correct answer is 16.
Answer: Option (c) is the correct response. Atoms of one element do not convert into another to generate products; however, bonds between these atoms break and products are formed, and atoms are...
Answer: (a)An exothermic reaction occurs when energy is discharged from the system into the environment. An endothermic reaction occurs when energy is taken from the environment in the form of heat....
(a) C2H6 and C4H6 (b) C6H12 and C5H12 (c) C4H6 and C6H12 (d) C2H5 and C4H10 Solution: Option (c) is the answer. Unsaturated hydrocarbons are those that belong to the alkene or...
Answer: (a) A chemical reaction is a process that occurs when reactants react to generate new material. It is defined by the evolution of a gas, color change, precipitate formation, temperature...
Answer: (a) By undergoing particular reactions and rearrangements, a chemical reaction produces new compounds. On the left, there will be reactants, and on the right, there will be products. Methane...
(a) Phosphorus (b) Fluorine (c) Carbon (d) Sulphur Solution: Option (c) is the answer. Buckminsterfullerene has the formula C60 and is a kind of fullerene. It is made up of twenty hexagons and...
(i) C3H8 (ii) C4H10 (iii) C5H12 (iv) C6H14 Solution: (e) (i) No isomers (ii) Two (iii) Three (iv) Five
(d) Give one example of a hydrocarbon, other than pentane, having more than three isomers. Solution: (c) Saturated cyclic hydrocarbon: Cyclohexane C6H12 Unsaturated Cyclic hydrocarbon: Benzene C6H6...
(b) Explain the meaning of saturated and unsaturated hydrocarbons with two examples each. Solution: (a) A hydrocarbon is a compound composed entirely of hydrogen and carbon. Methane (CH4), ethane...
Answer: The balanced chemical equation for heating of potassium nitrate to decompose into potassium nitrite and oxygen is as follows: 2KNO3 (s)→ 2KNO2 (s) + O2 (g)
Answer: The balanced chemical equation for the reaction of Barium chloride with Aliminium sulphate solution to form a precipitate of barium sulphate and aluminium chloride solution is as follows:...
(d) Write the IUPAC names for the following: Solution: (c) Butane (d) (i) 2-methylpropane (ii) 2-methylbutane (iii) Propene (iv) Propyne
(b) Write (i) structural formula, and (ii) electron-dot structure, of anyone isomer of n-heptane. Solution: (a) Isomers are organic molecules that have the same chemical formula but distinct...
The balanced chemical equation for the process of photosynthesis which produces carbohydrates and water is as follows: 6CO2 (g) + 6H2O (l) → C6H12O6 (aq.) + 6O2 (g) Thus reaction...
Answer: The balanced chemical equation for the reaction of ammonia with oxygen producing nitrogen and water: 4NH3 (g) + 3O2 (g) → 2N2 (g) + 6H2O (l)
Answer: (a) Balanced chemical equation for the reaction of calcium carbonate with hydrochloric acid: CaCO3 + 2HCl → CaCl2 + H2O + CO2 (b) Balanced chemical equation for the...
Answer: (a) Balanced chemical equation for heating of potassium chlorate: 2KClO3 (s) → 2KCl (s) + 3O2 (g) (b) Balanced chemical equation for burning of magnesium in carbon...
Answer: Carbon dioxide reacts with hydrogen under certain conditions to form methanol. The reaction for the same is as follows: CO(g) + 2H2(g) → CH3OH Conditions for the reaction to take place:...
(a) Magnesium carbonate reacts with hydrochloric acid to produce magnesium chloride, carbon dioxide, and water. (b) Sodium hydroxide reacts with sulphuric acid to produce sodium sulphate and water....
(d) State any two uses of graphite. Solution: (c) Each carbon atom in a graphite crystal is linked to just three other carbon atoms. As a result, the fourth valence electron is free and is...
(b) Describe the structure of graphite with the help of a labelled diagram. Solution: Solution: (a) Graphite is a carbon allotrope that is a soft, greyish black, and opaque carbon-based material....
(d) State any two uses of a diamond. Solution: (c) It has a high melting point, and breaking the network of strong covalent connections requires a lot of energy. (d) (i) Used in the creation of...
(b) Describe the structure of the diamond. Draw a simple diagram to show the arrangement of carbon atoms in a diamond. Solution: Solution: (a) A diamond is a clear, colourless material with...
(d) State one use of diamond which depends on its ‘extraordinary brilliance’ and one use of graphite that depends on its being ‘black and quite soft’. Solution: (c) Due to its hardness, diamond may...
(b) Explain why graphite can be used as a lubricant but diamond cannot. Solution: (a) (i) Carbon atoms in diamonds are bonded to four other carbon atoms. The carbon atom in graphite is connected to...
(i) ethyne (ii) ethene (iii) benzene (b) Write the molecular formula and structure of cyclohexane. How many covalent bonds are there in the molecule of cyclohexane? Solution: (i)(ii) (iii) (i)...
(b) Explain why, diamond is hard while graphite is soft. Solution: (a) By joining atoms to atoms, carbon may create lengthy chains. The most distinctive feature of a carbon atom is catenation. As a...
(c) Write the molecular formula and structure of benzene. Solution: (b) (i) Acetylene (ii) Ethylene (c) C6H6
(i) alkane ; (ii) alkene ; (iii) alkyne ; (iv) cycloalkane. Solution: (i)
(b) Write down the structures and names of two isomers of butane (C4H10). Solution: (a) Carbon can build long chains of carbon atoms through covalent bonding, which is why there are so many...
(b) Give any two differences between the properties of diamond and graphite. What causes these differences? Solution: Diamonds may be created artificially by exposing pure carbon to extremely high...
Solutions: An element's capacity to make bonds with other atoms of the same element is referred to as catenation. Both carbon and silicon show this property. In comparison to silicon, carbon has a...
(b) Which of the following is the molecular formula of benzene? C6H6 , C6H10 , C6H12 , C6H14 (c) Which of the two has a branched-chain: isobutene or normal butane? Solution: (a) Methane (single...
(i) Give the name and formula of the inorganic compound. (ii) Write the name and formula of the organic compound formed. (b) Give the molecular formula of butane and mention the names of its two...
![\[\mathbf{Mn}{{\mathbf{O}}_{\mathbf{2}}}~+\text{ }\mathbf{HCl}~\to ~\mathbf{MnC}{{\mathbf{l}}_{\mathbf{2}}}~+\text{ }\mathbf{C}{{\mathbf{l}}_{\mathbf{2}}}~+\text{ }{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-317aa71deab1d49ce7504365db016a36_l3.png "Rendered by QuickLaTeX.com")
Answer: (a) 2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O (b) MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O
(i) Temperature shiftsWhen calcium oxide combines vigorously with water to generate calcium hydroxide, a considerable quantity of heat is released, causing the system's temperature to rise,...
![\[\mathbf{Zn}\text{ }+\text{ }\mathbf{HCl}~\to ~\mathbf{ZnC}{{\mathbf{l}}_{\mathbf{2}}}~+\text{ }{{\mathbf{H}}_{\mathbf{2}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-0e9770d3c2ab9a6a471d45ce75a2df14_l3.png "Rendered by QuickLaTeX.com")
Answer: (a) In a chemical reaction, the physical state of the reactants and products can be indicated by using the letters in the round brackets. If it is solid, it will be (s), liquid, it will be...
Answer: (a) By balancing the total number of atoms of each element in reactants and products, a chemical equation can be created. To follow the Law of Conservation of Mass, a chemical equation must...
Answer: (a) Ca(OH)2 (aq)+ CO2 (g)—3000°C →CaCO3(s)+H2O(l) A chemical equation can be informative by 1) The chemical states of substances present in the reaction are denoted by (s) for solids,...
Answer: H2 + CuO→ Cu + H2O (i) H2 and Cu are elements (ii) CuO and H2O are compounds (iii) H2 and CuO are reactants (iv) Cu and H2O are products (v) Cu is the metal (vi) H2 is...
![\[~\left( \mathbf{i} \right)\text{ }\mathbf{N}{{\mathbf{H}}_{\mathbf{3}~}}\to \text{ }{{\mathbf{N}}_{\mathbf{2}~}}+\text{ }{{\mathbf{H}}_{\mathbf{2}}}\left( \mathbf{ii} \right)\text{ }\mathbf{C}\text{ }+\mathbf{C}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }\mathbf{CO}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-b15e1e600147f6c1f88738d016c15429_l3.png "Rendered by QuickLaTeX.com")
Solutions: Answer: (a) Chemical equations are symbols for chemical reactions in which the reactants and products are stated as chemical formulae. The left side of a chemical equation contains...
Answer: (a) By undergoing specific reactions and rearrangements, a chemical reaction produces new compounds. On the left, there will be reactants, and on the right, there will be products. The...
Answer: (a) Conservation of mass (b) Aqueous; (aq)
![\[\left( \mathbf{i} \right)\text{ }\mathbf{A}{{\mathbf{l}}_{\mathbf{2}}}{{\left( \mathbf{SO4} \right)}_{\mathbf{3}}}~+\text{ }\mathbf{NaOH}\text{ }\to \text{ }\mathbf{Al}{{\left( \mathbf{OH} \right)}_{\mathbf{3}}}~+\text{ }\mathbf{N}{{\mathbf{a}}_{\mathbf{2}}}\mathbf{S}{{\mathbf{O}}_{\mathbf{4}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-47b921d974572c1df03bd3ca30daae59_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{ii} \right)\text{ }\mathbf{HN}{{\mathbf{O}}_{\mathbf{3}}}~+\mathbf{Ca}{{\left( \mathbf{OH} \right)}_{\mathbf{2}}}~\to \text{ }\mathbf{Ca}{{\left( \mathbf{N}{{\mathbf{O}}_{\mathbf{3}}} \right)}_{\mathbf{2}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-155af7574f93c010ccb69dad4596317c_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{iii} \right)\text{ }\mathbf{NaOH}\text{ }+{{\mathbf{H}}_{\mathbf{2}}}\mathbf{S}{{\mathbf{O}}_{\mathbf{4}}}~\to \text{ }\mathbf{N}{{\mathbf{a}}_{\mathbf{2}}}\mathbf{S}{{\mathbf{O}}_{\mathbf{4}}}~+{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-42e779e6cf6540f80b62788bedc5f8a8_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{iv} \right)\text{ }\mathbf{BaC}{{\mathbf{l}}_{\mathbf{2}}}~+\text{ }{{\mathbf{H}}_{\mathbf{2}}}\mathbf{S}{{\mathbf{O}}_{\mathbf{4}}}~\to \text{ }\mathbf{BaS}{{\mathbf{O}}_{\mathbf{4}}}~+\mathbf{HCl}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-ff9c89450bbae180e66877b92158435d_l3.png "Rendered by QuickLaTeX.com")
Answer: (i) (ii) (iii) (iv)
![\[\left( \mathbf{i} \right)\text{ }\mathbf{Fe}\text{ }+{{\mathbf{O}}_{\mathbf{2}}}~\to \text{ }\mathbf{F}{{\mathbf{e}}_{\mathbf{2}}}{{\mathbf{O}}_{\mathbf{3}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-02c6afecd358f6421cfb1044b9cf319b_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{ii} \right)\text{ }\mathbf{Al}{{\left( \mathbf{OH} \right)}_{\mathbf{3}}}~\to \text{ }\mathbf{A}{{\mathbf{l}}_{\mathbf{2}}}{{\mathbf{O}}_{\mathbf{3}}}~+{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-56e1ce2cfa2bc8558eb869613b2a817d_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{iii} \right)\text{ }\mathbf{N}{{\mathbf{H}}_{\mathbf{3}}}+\text{ }\mathbf{CuO}\text{ }\to \text{ }\mathbf{Cu}\text{ }+{{\mathbf{N}}_{\mathbf{2}}}~+{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-0881654b71cf44d61dfb704ba4c11e0e_l3.png "Rendered by QuickLaTeX.com")
Answer: (i) (ii) (iii)
![\[\left( \mathbf{i} \right)\text{ }\mathbf{Na}\text{ }+\text{ }{{\mathbf{O}}_{\mathbf{2}}}~\to \text{ }\mathbf{N}{{\mathbf{a}}_{\mathbf{2}}}\mathbf{O}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-8714a7e5e31c46f0650ef10a3cd461ad_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{ii} \right)\text{ }{{\mathbf{H}}_{\mathbf{2}}}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\text{ }+\text{ }{{\mathbf{O}}_{\mathbf{2}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-217ecbe09eb1a5e807ce2367129ef46e_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{iii} \right)\text{ }\mathbf{Mg}{{\left( \mathbf{OH} \right)}_{\mathbf{2}}}~+\text{ }\mathbf{HCl}\text{ }\to \text{ }\mathbf{MgC}{{\mathbf{l}}_{\mathbf{2}}}~+{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-689a044051b673602fa040babfa9cac8_l3.png "Rendered by QuickLaTeX.com")
Answer:
Answer:
![\[\left( \mathbf{a} \right)~\mathbf{Ca}\text{ }+\text{ }{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}~\to ~\mathbf{CaOH}\text{ }+\text{ }\mathbf{H}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-1e64a2b6db2bc9e3e960957115665f7d_l3.png "Rendered by QuickLaTeX.com")
![\[\left( \mathbf{b} \right)~\mathbf{N}\text{ }+\text{ }\mathbf{H}~\to ~\mathbf{N}{{\mathbf{H}}_{\mathbf{3}}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-5da03fe9a6b5d23007e8dcbdd460d9c2_l3.png "Rendered by QuickLaTeX.com")
Answer: (a) (b)
(a) NaOH + ______ → Na2SO4 + H2O (b) Ca(OH)2 + _______ → CaCO3 + H2O Answer: (a) (b)
Answer: (a) (b)
Answer: (a) (b)
Answer: Balanced chemical equations for the given reactions:-
Answer: (a) A water-based solution (b) Exothermic reaction (c) Thermodynamic reaction
The term "endothermic reaction" refers to a reaction in which heat is absorbed. As we all know, photosynthesis is a process in which green plants and other organisms use sunlight to convert carbon...
The symbol (aq) represents an aqueous solution in a chemical equation.
Answer: Since oxygen is not present in its elemental form, so it is not possible for it to take part in the reaction as O. Here, Oxygen should be in molecular form, O2. The corrected and balanced...
Answer: False This statement is false because every reactant and product has a definite formula depending on the valency of the constituents. So, altering its formula for balancing an equation would...
Magnesium ribbon is made of pure magnesium metal. It is highly reactive with oxygen, resulting in the oxidation of magnesium when it comes into contact with air. It produces an oxide layer on the...
Calcium oxide is the chemical formula for quick lime. When calcium hydroxide (slaked lime) is introduced to water in a bucket, it forms calcium hydroxide (slaked lime) and reacts rapidly, producing...
A chemical equation is always balanced when the number of atoms of each element on the reactant and product sides is compared. It is based on the Law of Conservation of Mass, which states that the...
An exothermic reaction is the one in which energy is released. As energy is released during the process of breathing, it is referred to as an exothermic reaction.