solution: Hypothyroidism during pregnancy causes inadequate turn of events and hindered development (cretinism). Mental impediment and low IQ.
Test
Elderly individuals have a feeble resistant framework. What could be the explanation?
solution: Thymosin is the significant chemical that assumes a significant part in the safe framework yet with age, thymus organ begins to decline and hence elderly individuals have a frail safe...
Incendiary reactions can be constrained by a specific steroid. Name the steroid, its source and furthermore its other significant capacities.
solution: Cortisol is a steroid chemical which is discharged by the adrenal cortex that produces mitigating reactions and stifles the insusceptible reaction.
George comes on a get-away to India from the US. The long excursion upsets his natural framework and he experiences stream slack. What is the reason for his uneasiness?
solution: Melatonin is the chemical which is answerable for this organic framework inconvenience. Fly slack is a transitory rest problem.
On an instructive excursion to Uttaranchal, Ketki and her companions see that numerous neighborhood individuals were having enlarged necks. Kindly assistance Ketki and her companions to discover the answers for the accompanying inquiries.
a. Which likely infection are these individuals experiencing? b. How could it be caused? c. What impact does this condition have on pregnancy? solution: a. Goiter. This is because of the...
What is the job of the second courier in chemical activity?
solution: Optional courier like (cAMP) go about as intracellular hormonal arbiter which convey the data inside the objective cell. Auxiliary courier is cAMP, cGMP, diacylglycerol, inositol...
What is the pretended by luteinizing chemicals in guys and females separately?
solution: On account of Males, the LH animates Androgen emission and combination from testicles. The head of androgen is testosterone which animates the spermatogenesis and liable for the...
Revamp the accompanying chemicals in Column I to coordinate with their substance nature in Column II
Section I a. Oxytocin b. Epinephrine c. Progesterone d. Development chemical Segment II I. Amino corrosive subsidiary ( ) ii. Steroid ( ) iii. Protein ( ) iv. Peptide ( ) solution: a-iv, b-I, c-ii,...
. Right the accompanying proclamations by supplanting the term underlined.
a. Insulin is a steroid chemical. b. TSH is emitted from the corpus luteum c. Tetraiodothyronine is a crisis chemical. d. The pineal organ is situated on the foremost piece of the kidney. solution:...
A patient whines of consistent thirst, unnecessary passing of pee and low pulse. At the point when the specialist checked the patients’ blood glucose and blood insulin level, the level was typical or somewhat low. The specialist analyzed the condition as diabetes stale us. However, he chose to gauge another chemical in patients blood. Which chemical does the specialist mean to quantify?
solution; Specialist plans to quantify vasopressin chemical since this chemical builds the reabsorption of water by the kidney and inadequacy of this chemical abatements reabsorption of water
State whether valid or bogus:
a. The gastrointestinal lot, kidney and heart likewise produce chemicals. b. Standards distalis produces six trophic chemicals. c. B-lymphocytes give cell-interceded resistance. d. Insulin...
What is the job of the second courier in the component of protein chemical activity?
solution: cAMP goes about as an intercellular chemical which is an auxiliary courier those convey the data as intracellular to the objective cells.
Name the chemical that aides in cell-interceded invulnerability.
solution: Thymosin is the chemical that aides in cell-interceded resistance. It helps in development of T-cells and separation of T-cells.
Name the endocrine organ that produces calcitonin and notice the pretended by this chemical.
solution: The thyroid organ is an endocrine organ which produces calcitonin chemical which is a peptide chemical. This chemical reductions the convergence of calcium particles in the plasma.
Name the lone chemical emitted by standards intermedia of the pituitary organ.
solution: Standards intermedia emit just a single chemical called melanocyte-animating chemical (MSH).
What is erythropoiesis? Which chemical animates it?
solution: Arrangement of RBCs is called Erythropoiesis. Erythropoietin chemical animates for erythropoiesis.
Which of the two adrenocortical layers, zona glomerulosa and zona reticularis lies outside encompassing the other?
solution: Zonaglomerulosa is the peripheral layer which encompasses different layers. The center layer is Zona fasciculate and deepest layer is Zonareticularis.
There are numerous endocrine organs in the human body. Name the organs which are missing in male and the one missing in the female.
solution: Ovaries are missing in male and testicles are missing in female both emit sex chemicals.
Which of the accompanying conditions isn’t connected to a lack of thyroid hormones?
a. Cretinism b. Goiter c. Myxedema d. Exophthalmia solution: Alternative (d) is the appropriate response.
Question 12.3: Draw the structures of the following compounds.
(i) 3-Methylbutanal (ii) p-Nitropropiophenone (iii) p-Methylbenzaldehyde (iv)4-Methylpent-3-en-2-one (v) 4-Chloropentan-2-one (vi) 3-Bromo-4-phenylpentanoic acid (vii)...
Which of the accompanying organs in vertebrates doesn’t comprise of a focal medullary’ area encompassed by a cortical district?
a. Ovary b. Adrenal c. Liver d. Kidney solution: Alternative (c) is the appropriate response.
Which of the accompanying organs in vertebrates doesn’t comprise of a focal calcium balance in the human body?
a. Nutrient D b. Parathyroid chemical c. Thyrocalcitonin d. Thymosin solution: Choice (d) is the appropriate response.
Pick the right alternative among the accompanying choices
Section I A. Epinephrine B. Testosterone C. Glucagon D. Atrial natriuretic factor Segment II I. Animates muscle development ii. A diminishing in pulse iii. Breakdown of liver glycogen Content iv....
Chemicals are considered synthetic signals that animate explicit objective tissues. Their activity relies upon the presence of receptors on the individual objective tissues. Which of coming up next is the right area of the receptors on account of protein chemicals?
a. Extracellular grid b. Blood c. Plasma layer d. Core solution: Alternative (c) is the appropriate response.
A chemical liable for the ordinary rest wake cycle is
a. Epinephrine b. Gastrin c. Melatonin d. Insulin solution: Choice (c) is the appropriate response.
Cortisol is emitted by
a. Pancrease b. Thyroid c. Adrenal d. Thymus solution: Choice (c) is the appropriate response.
Corpus luteum secretes a chemical called
a. Prolactin b. Progesterone c. Aldosterone d. Testosterone solution: Choice (b) is the appropriate response.
Leydig cells produce a gathering of chemicals called
a. Androgens b. Estrogens c. Aldosterone d. Gonadotropins solution: Choice (a) is the appropriate response.
In the system of activity of a protein chemical, one of the subsequent couriers is
a. Cyclic AMP b. Insulin c. T3 d. Gastrin solution: Choice (a) is the appropriate response.
Thymosin is liable for
a. Raising the glucose level b. Raising the blood calcium level c. Separation of T lymphocytes d. The reduction in blood RBC solution: Choice (c) is the appropriate response.
The steroid liable for the equilibrium of water and electrolytes in our body is
a. Insulin b. Melatonin c. Testosterone d. Aldosterone solution: Choice (d) is the appropriate response.
Mary is going to confront a meeting. In any case, during the initial five minutes prior to the meeting, she encounters perspiring, expanded pace of heartbeat ,breath and so forth which of the accompanying chemical are capable for her anxiety?
a. Estrogen and progesterone b. Oxytocin and vasopressin c. Adrenaline and noradrenaline d. Insulin and glucagon solution: Choice (c) is the appropriate response.
Which of the accompanying chemicals isn’t emitted by the front pit.
a. Development chemical b. Follicle-animating chemical c. Oxytocin d. Adrenocorticotrophic chemical solution: Choice (c) is the appropriate response.
Which of the following is not a physical change?
(a) Boiling of water to give water vapour
(b) Melting of ice to give water
(c) Dissolution of salt in water
(d) Combustion of Liquefied Petroleum Gas (LPG)
Answer: (d) Combustion of Liquefied Petroleum Gas (LPG) Explanation: Because a new compound is generated after burning, combustion is always accompanied by a chemical change, which is irreversible...
Natural arrangement is a dynamic and steadily developing wonder which continues changing with our comprehension of living things. Legitimize the assertion taking any two models.
solution: C. Linnaeus grouped the living beings dependent on morphological characters like Plantae and Animalia. In any case, it was not adequate as there were sure living beings guaranteed by both...
‘Peat’ is a significant wellspring of homegrown fuel in a few nations. How is ‘peat’ framed in nature?
solution: Peat is shaped from the wetland vegetation particularly from the Sphagnum (lowland greenery). Sphagnum likes to fill in acidic nature in the lowland, because of the acridity the total...
Make a rundown of green growth and organisms that have business esteem as a wellspring of food, synthetic compounds, drugs and grub.
solution: Significance of green growth Green growth is utilized as food in numerous species like Porphyra, laminaria and so on Chlorella and spirulina are unicellular green growth wealthy in protein...
Aside from chlorophyll, green growth have a few different shades in their chloroplast. What shades are found in blue-green, red and earthy colored green growth that are liable for their trademark tones?
solution: Blue green growth phycocyanin and r-phycoerythrin shades are available adjacent to chlorophyll a Earthy colored green growth have chlorophyll a, c, carotenoids and xanthophylls. They are...
Green growth are known to recreate agamically by an assortment of spores under various ecological conditions. Name these spores and the conditions under which they are created.
solution: Zoospores are meager walled spores that are motile and whipped. They are delivered under great conditions Aplanospores are meager walled non-motile spores and created under negative...
Organisms are cosmopolitan. Compose the job of organisms in your day to day routine.
solution: Utilized in the bottling works and heating industry: Saccharomyces cerivesea is utilized. Under anaerobic conditions interaction of maturation happens which discharges ethanol and CO2. The...
What perceptible provisions in Trypanosoma would cause you to characterize it under realm Protista?
solution: Trypanosoma is a unicellular eukaryotic life form. Motion is worked with by flagella. Strategy for generation is agamic. The save food material is available as granules.
At a phase of their cycle, ascomycetes growths produce the fruiting bodies like apothecium, perithecium or cleistothecium. How are these three sorts of fruiting bodies not quite the same as one another?
solution: Apothecium: It's a saucer or cup-formed, open fruiting body. Perithecium: Flask formed fruiting body. With an initial top called the ostiole. Cleistothecium: It's a shut round structure....
Cyanobacteria and heterotrophic microbes have been clubbed together in Eubacteria of realm Monera according to the “Five Kingdom Classification” despite the fact that the two are boundlessly unique in relation to one another. Is this gathering of the two kinds of taxa in a similar realm supported? Provided that this is true, why?
solution: Cyanobacteria combination their food and they are autotrophic. Heterotrophic microbes rely upon different living beings for their food. Both Cyanobacteria and heterotrophic microscopic...
Neurospora – an ascomycetes parasite has been utilized as an organic instrument to comprehend the system of plant hereditary qualities much similarly as Drosophila has been utilized to examine creature hereditary qualities. What makes Neurospora so exceptionally significant as a hereditary device?
solution: Neurospora is utilized as a hereditary instrument on the grounds that Quickest developing in vitro can be filled in negligible media. • Due to its haploid nature it can communicate both...
There is a fantasy that following weighty downpours in woodland, mushrooms show up in huge number and make an extremely enormous ring or circle, which might be a few meters in breadth. These are called ‘Pixie rings’. Would you be able to clarify this fantasy of pixie rings in natural terms?
solution: This normally happening ring or curve of mushrooms, happening as a typical turf sickness, is distinguished as enormous dead rings or curve of grass in yards throughout the spring or summer...
Diatoms are likewise called as ‘pearls of the sea’, why? What is diatomaceous earth?
solution: Diatoms are significantly phytoplankton's which are the main makers of sea. Subsequently known as "pearls of seas"
In the five-realm arrangement of Whittaker, what number of realms are eukaryotes?
solution: Eukaryotes are the organic entities whose core and cell is limited by a layer. Four realms have eukaryotic organic entities a) Protista b) Fungi c) Plantae d)Animalia.
An infection is considered as a living life form and a commit parasite when inside a host cell. Be that as it may, the infection isn’t characterized alongside microscopic organisms or parasites. What are the characters of the infection that are like non-living items?
solution: Infections have no total cell structure.Try not to show development, division, digestion and need breath.High explicit gravityTry not to follow Robert Koch's proposeCan't be become under...
The normal name of pea is less difficult than its natural (logical) name Pisum sativum. Why then, at that point is the easier normal name not utilized rather than the complex logical/natural name in science?
solution: Pea is known by various names in various nations. So rather than calling an assortment of names, logical names are given which are same on the planet all through. It is overall...
Are chemosynthetic microbes autotrophic or heterotrophic?
solution: Chemosynthetic microbes are autotrophic. They acquire energy for the blend of food by oxidizing inorganic substances.
Contaminated water bodies have typically an exceptionally high plenitude of plants like Nostoc and Oscillitoria. Give reasons.
solution: Contaminated water bodies are wealthy in supplements particularly in nitrogen content which gives good condition to green growth like Nostoc and Oscillotoria to blossom in the water...
How is the five-realm order worthwhile over the two realm arrangement?
solution: Two realm orders didn't recognize the prokaryotes and eukaryotes They didn't recognize unicellular and multicellular life forms They additionally didn't recognize...
Assume you incidentally track down an old saved long-lasting slide without a name. In your work to recognize it, you place the slide under the magnifying instrument and notice the accompanying elements:-
a. Unicellular b. Distinct core c. Biflagellate–one flagellum lying longitudinally and the other dynamically. What might you recognize it as? Would you be able to name the realm it has a place with?...
Nitrogen exists as diatomic molecule and phosphorus as P4. Why?
Nitrogen because of its small size has a capacity to form pπ−pπ multiple bonds with itself.Thus, nitrogen forms a very stable diatomic molecule, N2. On moving down a group, the tendency...
Why does R3P=O exist but R3N=O does not (R = alkyl group)?
Nitrogen, N (unlike P) does not have the d-orbital. This restricts nitrogen to expand its coordination number beyond four. Hence, R3N=O does not exist and it cannot accommodate more electrons due...
The HNH angle value is higher than HPH, HAsH and HSbH angles. Why? [Hint: Can be explained on the basis of sp3 hybridisation in NH3 and only s−p bonding between hydrogen and other elements of the group.
The H-M-H bond angles for the hydrides of group-15 elements are as follows: NH3 = 107o PH3 = 92o AsH3 = 91o SbH3 = 90oThe above trend in the H−M−H bond angle can be explained on the basis of the...
Give the resonating structures of NO2 and N2O5.
The resonating structures of the given compounds are as follows: NO2 : N2O5 :
What is the rule basic the utilization of cyanobacteria in rural fields for crop improvement?
solution: Cyanobacteria are equipped for fixing nitrogen with the assistance of particular cells called the heterocyst. They enhance the dirt ripeness. Thus BGA's are utilized in rural fields. For...
Individuals from Phycomycetes are found in
I. Amphibian territories ii. On rotting wood iii. Wet and clammy spots iv. As commit parasites on plants Look over the accompanying alternatives a. Nothing unless there are other options b. I and iv...
Infections are non-cell organic entities however recreate themselves once they taint the host cell. To which of the accompanying realm do infections have a place with?
a. Monera b. Protista c. Parasites d. None of the above solution: Choice (d) is the appropriate response.
As for contagious sexual cycle, pick the right arrangement of occasion
a. Karyogamy, Plasmogamy and Meiosis b. Meiosis, Plasmogamy and Karyogamy c. Plasmogamy, Karyogamy and Meiosis d. Meiosis, Karyogamy and Plasmogamy solution: Choice (c) is the appropriate...
Distinction among Virus and Viroid is
a. Nonattendance of protein coat in viroid however present in infection b. Presence of low sub-atomic weight RNA in the infection however missing in viroid c. Both an and b d. Nothing unless there...
Relationship among Mycobiont and Phycobiont are found in
a. Mycorrhiza b. Root c. Lichens d. BGA solution: Choice (c) is the appropriate response.
Contagium vivum fluidum was proposed by
a. D.J. Ivanowsky b. M.W. Beijerinek c. Stanley d. Robert Hook solution: Choice (b) is the appropriate response.
A dikaryon is shaped when
a. Meiosis is captured b. The two haploid cells don't meld right away c. Cytoplasm doesn't meld d. Nothing unless there are other options solution: Choice (b) is the appropriate...
A relationship between foundations of higher plants and parasites is called
a. Lichen b. Greenery c. Mycorrhiza d. BGA solution: Choice (c) is the appropriate response.
Bare cytoplasm, multinucleated and saprophytic is the qualities of
a. Monera b. Protista c. Parasites d. Ooze molds solution: Choice (d) is the appropriate response.
Living beings living in pungent regions are called as
a. Methanogens b. Halophiles c. Heliophytes d. Thermoacidophiles solution: Alternative (b) is the appropriate response.
The five-realm order was proposed by
a. R.H. Whittaker b. C.Linnaeus c. A. Roxberg d. Virchow solution: Alternative (a) is the appropriate response.
All eukaryotic unicellular life forms have a place with
a. Monera b. Protista c. Organisms d. Microbes solution: Alternative b is the appropriate response.
A portion of the properties of tissues are not the constituents of their cells. Give three guides to help the assertion.
solution: Blood is a connective tissue that is comprised of RBCs, WBCs and Platelets. It capacities as a supplement carrier inside the body while the platelets wear not play this capacity. Bone is a...
What is the likeness and difference between “entire moong daal” and “broken moong daal” as far as breath and development? In view of these boundaries group them into living or nonliving?
rrangement: Entire moong daal has a flawless incipient organism whose breath rate is delayed during the period of torpidity. When these are given development condition, such as furnishing it with...
Do you consider an individual in extreme lethargies living or dead?
solution: A state of extreme lethargy is characterized as a drawn out condition of obviousness. The individual who is enduring unconsciousness will be ignorant of the environmental factors. A...
Digestion is a characterizing component of all living life forms regardless. Confined metabolic responses in vitro are not living things however certainly living responses. Remark.
solution: Digestion is characterized as the all out of all substance responses that happen inside the body. Digestion is absolutely normal for living creatures. No living organic entity can display...
An understudy of scientific classification was confounded when advised by his teacher to search for a key to distinguish a plant. He went to his companion to explain what ‘Key’ the teacher was alluding to? What might the companion disclose to him?
solution: A key is utilized to distinguish plants and creatures dependent on their likenesses and dissimilarities. The keys made depend on the differentiating characters that are portrayed by the...
Characterize a taxon. What is implied by ordered chain of command? Give a stream outline from the most reduced to the most elevated class for a plant and a creature. What befalls the quantity of people and number of shared characters as we go up the taxonomical chain of command?
solution: The gathering of life forms at any level is known as Taxon. This can be positioned as Species-sort family-request class-phylum/division-realm As we go from species to realm there is a...
What are taxonomical guides? Give the significance of herbaria and exhibition halls. How are Botanical nurseries and Zoological parks valuable in rationing biodiversity?
solution: Assortment of data, strategies, methodology which assists with distinguishing and group an individual is called ordered guides. Significance of herbarium a) Collection of dried, squeezed...
Brassica campestris Linn
a. Give the normal name of the plant. b. What do the initial two pieces of the name signify? c. For what reason would they say they are written in italics? d. What is the significance of Linn...
A researcher has run over a plant which he feels is another species. How might he approach its recognizable proof, grouping and terminology?
solution: A new distinguish animal groups can be effectively characterized by ordered guides. The researcher needs to do similar investigations of the morphological and physical elements with the...
What is implied by living? Give any four characterizing components of living things.
solution: The capacity of an item which can self-recreate and self manage is known as Living. The 4 characterizing attributes are- I) Growth ii) Reproduction iii) Metabolism iv) Consciousness...
The number and sorts of the life form are not steady. How would you clarify this assertion?
solution: A few components are there which assumes a significant part in this. Season, elimination and human exercises. A considerable lot of the living life forms are available at a specific time...
Properties of cell organelles are not generally found in the atomic constituents of cell organelles. Legitimize.
solution: This marvel of all living organic entity is because of hidden connections. The properties of cell organelles are absent in the atomic constituents.
Brinjal and potato have a place with similar family Solanum, however two unique species. What characterizes them as isolated species?
solution: As far as multiplication, these two species changes. They share similar family however they stay various species.
A plant might have various names in various locales of the nation or world. How do botanists take care of this issue?
solution: They have given a logical name for each plant and creatures. It turned into the normal name all through the world. Model: Mango is experimentally named as Mangifera indica. Mango is called...
What is the contrast between verdure, fauna and vegetation? Eichhornia crassipes is called as a colorful species while Rauwolfia serpentina is an endemic species in India. What do these terms extraordinary and endemic allude to?
solution: Greenery is a vegetation happens in a specific locale or time. Fauna is the complete number of creatures found in a specific locale or time Vegetation is a term utilized for plant...
How would you set up your herbarium sheets? What are the various instruments you convey with you while gathering plants for the arrangement of a herbarium? What data should a saved plant material on the herbarium sheet accommodate taxonomical examinations?
solution: For setting up a herbarium sheet, the paper is cut in the ideal length →say, 29 x 41 cm.) The dried example is taken and mounted on the sheers with the assistance of paste. You might...
A plant animal categories shows a few morphological varieties because of an altitudinal angle. At the point when developed under comparable states of development, the morphological varieties vanish and every one of the variations have normal morphology. What are these variations called?
solution: These variations are known as the 'ecotypes'. Plants show changes in morphological components because of the altitudinal angle.
Worldwide Code of Botanical Nomenclature →ICBN) has given a code to order of plants. Give order of units of arrangement botanists follow while grouping plants and notice diverse ‘Additions’ utilized for the units.
solution: The chain of importance continued in plants: Species → Genus → Family → Order → Class →Division → Kingdom Postfixes utilized by botanists are as per the following: Taxon Suffix a) Division...
In a given living space we have 20 plant species and 20 creature species. Would it be advisable for us to call this ‘variety’ or ‘biodiversity’? Legitimize your answer.
solution: Biodiversity is only the complete of creature present in a specific region while variety is named for a huge region which might be utilized for living or non-living things.
. A wad of snow when turned over snow expansions in mass, volume and size. Is this tantamount to development as found in living life forms? Why?
solution: The development in the event of ice ball is totally apathetic from development. This occurs because of the outward development by the testimony of a similar material.
Couplet in ordered key means ________________ .
solution: The ordered key gives a specific design based on which the client can figure out the ordered situation of the obscure species. Couplet implies a couple which is of differentiating...
What does ICZN rely on?
Arrangement: ICZN represents International Code of Zoological Nomenclature. It directs a uniform arrangement of zoological terminology.
Linnaeus is considered as Father of Taxonomy. Name two different botanists known for their commitment to the field of plant scientific categorization?
Solution: George Bentham and Joseph Dalton Hooker are known botanists who gave the regular arrangement of order of blooming plants.
Give two identifying features of an adult male frog?
i) Presence of vocal sacs in male frogs- The male frogs have saggy-skinned vocal sacs inside the necks. ii) Presence of Copulation pad in male frogs -The male frogs have a copulatory pad (nuptial...
Match the following and choose the option which is right.
I A. Family B. Kingdom C. Order D. Species E. Genus II i. tuberosum ii. Polymoniales iii. Solanum iv. Plantae v. Solanaceae Options are as follows: a. A-iv, B-iii, C-v, D-ii, E -i...
What is the defining characteristic of a living organism
a. Growth b. Reproduction c. Response to external stimuli d. All the above Solution: Option (c) Response to external stimuli is the answer
. All living organisms are linked because
a. They have the common genetic materials b. They all share a common genetic material but of varying degrees c. All have common cellular organization d. none of these Solution: Option (b) They all...
One of the taxonomic tools taxonomic key is used in the preparation of
a monographsb florac both (a) and (b)d none of these Solution: alternative C since Flora is book containing data concerning the environment, environment, occasional changes, circulation, portrayal...
What does Botanical gardens and zoological parks have
a. Collection of endemic living species b. Collection of exotic living species c. Both a and b d. Collection of local plants and animals Solution: Option (c) Both a and b is the...
Which hierarchical level in classification of plants is equivalent to the taxonomic unit ‘phylum’ in the classification of animals?
a. Family b. Class c. Order d. Division Solution: Option (d) Division is the answer.
Genus represents
a. A particular plant or animal b. A group of intimately related species of animals or plants c. A collection of animals or plants d. None of these Solution: Option (b) A group of intimately...
The term ‘systematics’ refers to:
a. Identification of organ systems of plants and animals and their study b. Identification preservation and study of plants and animals c. Diversity of all kinds of organisms and their relationship...
For taxonomic category of ‘family’ which of the following ‘suffixes’ used.
a. – Ae b. – Onae c. – Aceae d. – Ales Solution: Option (c) Aceae is the answer
How will the number of common characteristics change when we go from species to kingdom in a taxonomic hierarchy ?(a) Will decrease (b) Will increase (c) Remain same (d) May increase or decrease
Solution: Option (a) it decrease is the answer . As we go higher from species to realm, the quantity of normal attributes continues diminishing. Lower the taxa, more are the attributes that...
Why does NH3 form hydrogen bond but PH3 does not?
When nitrogen is compared to phosphorus, nitrogen is comparatively of higher electronegativity. This causes a greater attraction of electrons towards nitrogen in NH3 than towards phosphorus atom...
Which one of the following four metals would be displaced from the solution of its salts by the other three metals?
a) Mg b) Ag c) Zn d) Cu Answer: b) Ag
Generally, non-metals are not lustrous. Which of the following nonmetal is lustrous?
a) Sulphur b) Oxygen c) Nitrogen d) Iodine Answer: d) Iodine
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
i) Na ii) Ca iii) Fe iv) Cu a) i and iv b) iii and iv c) i and iii d) i and ii Answer: d) i and ii
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
a) Na b) Fe c) Cr d) Hg Answer: d) Hg
If copper is kept open in the air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of
a) CuSO4 b) CuCO3 c) CuNO3 2 d) CuO Answer: d) CuO
Stainless steel is a very useful material for our life. In stainless steel, iron is mixed with
a) Ni and Cr b) Cu and Cr c) Ni and Cu d) Cu and Au Answer: a) Ni and Cr
Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
a) Gallium b) Aluminium c) Zinc d) Silver Answer: c) Zinc
Silver articles become black on prolonged exposure to air. This is due to the formation of
a) Ag3N b) Ag2O c) Ag2 S d) Ag2S and Ag3N Answer: c) Ag2S
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
i) Au ii) Cu iii) Na iv) K a) i and ii b) i and iii c) ii and iii d) iii and iv Answer: d) iii and iv
Which of the following metals exist in their native state in nature?
CuAuZnAg a) i and ii b) ii and iii c) ii and iv d) iii and iv Answer: c) ii and iv
Which one of the following properties is not generally exhibited by ionic compounds?
a) Solubility in water b) Electrical conductivity in solid-state c) High melting and boiling points d) Electrical conductivity in a molten state Answer: b) Electrical conductivity in...
Which of the following are not ionic compounds?
i) KCl ii) HCl iii) CCl4 iv) NaCl a) i and ii b) ii and iii c) iii and iv d) i and (iii) Answer:...
Generally, metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals except Mn and Mg?
a) H2 SO4 b) HCl c) HNO3 d) All of these Answer: c) HNO3
The composition of aqua-regia is
a) Dil.HCl: Conc. HNO3 3: 1 b) Conc.HCl: Dil. HNO3 3 : 1 c) Conc.HCl: Conc.HNO3 3 : 1 d) Dil.HCl: Dil.HNO3 3: 1 Answer: c) Conc.HCl: Conc.HNO3 3: 1
What happens when calcium is treated with water?
i) It does not react with water ii) It reacts violently with water iii) It reacts less violently with water iv) Bubbles of hydrogen gas formed stick to the surface of calcium...
Which one of the following metals does not react with cold as well as hot water?
a) Na b) Ca c) Mg d) Fe Answer: d) Fe
Which of the following oxides of iron would be obtained on the prolonged reaction of iron with steam?
a) FeO b) Fe2O3 c) Fe3O4 d) Fe2O3 and Fe3O4 Answer: c) Fe3O4
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
i) Good thermal conductivity ii) Good electrical conductivity iii) Ductility iv) High melting point a) i and ii b) i and iii...
The ability of metals to be drawn into thin wires is known as
a) ductility b) malleability c) sonorousity d) conductivity Answer: a) ductility
Which of the following property is generally not shown by metals?
a) Electrical conduction b) Sonorous in nature c) Dullness d) Ductility Answer: c) Dullness
. Identify the correct representation of reaction occurring during the chloralkali process
(a) \[2NaCl(I)+2H2O\to 2NaOH(I)+Cl2+H2(g)\] (b) \[2NaCl(aq)+2H2O(aq)\to 2NaOH(aq)+Cl2(g)+H2(g)\] (c) \[2NaCl(aq)+2H2O(I)\to 2NaOH(aq)+Cl2(aq)+H2(aq)\] (d) \[2NaCl(aq)+2H2O(I)\to...
Which of the following are present in a dilute aqueous solution of hydrochloric acid?
(a) \[H2{{O}^{+}}+C{{l}^{-}}\] (b) \[H2{{O}^{+}}+O{{H}^{-}}\] (c) \[C{{l}^{-}}+O{{H}^{-}}\] (d) unionised \[HCl\] Answer: (a) \[H2{{O}^{+}}+O{{H}^{-}}\]
Which of the following statements is true for acids?
(a) Bitter and change red litmus to blue (b) Sour and change red litmus to blue (c) Sour and change blue litmus to red (d) Bitter and change blue litmus to red Answer: (c) Sour and change blue...
Which of the following is(are) true when HCl (g) is passed through water?
(i) It does not ionise in the solution as it is a covalent compound. (ii) It ionises in the solution (iii) It gives both hydrogen and hydroxyl ion in the solution (iv) It forms hydronium ion in the...
Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained? (You may use colour guide given in the figure.
(a) Red (b) Yellow (c) Yellowish green (d) Blue Answer: (c) Yellowish green
25. Match the chemical substances given in Column (A) with their appropriate application given in Column (B)
Column (A)Column (B)(A) Bleaching powder(i) Preparation of glass(B) Baking soda(ii) Production of \[H2\]and \[Cl2\](C) Washing soda(iii) Decolourisation(D) Sodium chloride(iv) Antacid (a) A—(ii),...
Which of the following statements is not correct?
(a) All metal carbonates react with acid to give a salt, water and carbon dioxide (b) All metal oxides react with water to give salt and acid (c) Some metals react with acids to give salt and...
Which among the following is not a base?
(a) \[NaOH\] (b) \[KOH\] (c) \[NH4OH\] (d) \[C2H5OH\] Answer: (d) \[C2H5OH\]
Which of the following is not a mineral acid?
(a) Hydrochloric acid (b) Citric acid (c) Sulphuric acid (d) Nitric acid Answer: (b) Citric acid
. Which of the following is used for dissolution of gold?
(a) Hydrochloric acid (b) Sulphuric acid (c) Nitric acid (d) Aqua regia Answer: (d) Aqua regia
Which of the following phenomena occur, when a small amount of acid is added to water?
(i) Ionisation (ii) Neutralisation (iii) Dilution (iv) Salt formation (a) (i) and (ii) (b) (i) and (iii) (c) (ii) and (iii) (d) (ii) and (iv) Answer: (b) (i) and (iii)
Which one of the following can be used as an acid-base indicator by a visually impaired student?
(a) Litmus (b) Turmeric (c) Vanilla essence (d) Petunia leaves Answer: (c) Vanilla essence
Which of the following substance will not give carbon dioxide on treatment with dilute acid?
(a) Marble (b) Limestone (c) Baking soda (d) Lime Answer: (d) Lime
Which of the following is acidic?
(a) Lime juice (b) Human blood (c) Lime water (d) Antacid Answer: (a) Lime juice
In an attempt to demonstrate electrical conductivity through an electrolyte, the following apparatus
The below diagram was set up. Which among the following statement(s) is(are) correct? Bulb will not glow because the electrolyte is not acidicBulb will glow because NaOH is a strong base and...
Common salt besides being used in the kitchen can also be used as the raw material for making:
(i) washing soda (ii) bleaching powder (iii) baking soda (iv) slaked lime (a) (i) and (ii) (b) (i), (ii) and (iv) (c) (i) and (iii) (d) (i), (iii) and (iv) Answer: (a) (i) and...
One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is
(a) hydrochloric acid (b) tartaric acid (c) acetic acid (d) sulphuric acid Answer: (b) tartaric acid
To protect tooth decay we are advised to brush our teeth regularly. The nature of the toothpaste commonly used is
(a) acidic (b) neutral (c) basic (d) corrosive Answer: c) Basic
Which of the following statements is correct about an aqueous solution of an acid and of a base?
(i) Higher the pH, stronger the acid (ii) Higher the pH, weaker the acid (iii) Lower the pH, stronger the base (iv) Lower the pH, weaker the base (a) (i) and (iii) (b) (ii) and (iii) (c) (i) and...
The pH of the gastric juices released during digestion is
(a) less than 7 (b) more than 7 (c) equal to 7 (d) equal to 0 Answer: (a) less than 7
Sodium hydrogen carbonate, when added to acetic acid, evolves a gas. Which of the following statements are true about the gas evolved?
(i) It turns lime water milky (ii) It extinguishes a burning splinter (iii) It dissolves in a solution of sodium hydroxide (iv) It has a pungent odour (a) (i) and (ii) (b) (i), (ii) and (iii) (c)...
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
(a) Wash the hand with saline solution (b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate (c) After washing with plenty of water apply a solution...
Which of the following gives the correct increasing order of acidic strength
Water < Acetic acid < Hydrochloric acidWater < Hydrochloric acid< Acetic acidAcetic acid< Water < Hydrochloric acidHydrochloric acid< Water<Acetic acid Answer: 1. Water <...
A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
(a) Lemon juice (b) Vinegar (c) Common salt (d) An antacid Answer: (d) An antacid
Calcium phosphate is present in tooth enamel. Its nature is
(a) basic (b) acidic (c) neutral (d) amphoteric Answer: (a) basic
Sodium carbonate is a basic salt because it is a salt of
(a) strong acid and strong base (b) weak acid and weak base (c) strong acid and weak base (d) weak acid and strong base Answer: (d) weak acid and strong base
Which of the following salts does not contain water of crystallisation?
(a) Blue vitriol (b) Baking soda (c) Washing soda (d) Gypsum Answer: (b) Baking soda
During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to
(a) absorb the evolved gas (b) moisten the gas (c) absorb moisture from the gas (d) absorb Cl– ions from the evolved gas Answer: (c) absorb moisture from the gas
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
(a) Baking powder (b) Lime (c) Ammonium hydroxide solution (d) Hydrochloric acid Answer: (d) Hydrochloric acid
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) The temperature of the solution increases (ii) The temperature of the solution decreases (iii) The temperature of the solution remains the same (iv) Salt formation takes place (a) (i) only...
Discuss the trends in chemical reactivity of group 15 elements.
The general trends in chemical properties of the group – 15 are as follows:(i) Reactivity towards hydrogen:The elements present in group 15 undergo a reaction with hydrogen to form hydrides of type...