(i) What is the order of the reaction? (ii) What is the slope of the curve? (iii) What are the units of the rate constant? Answers: (i) Zero-order reaction is the order of reaction. (ii)...
The molecularity of any reaction is the number of reactions involved in the basic reaction. Zero molecularity means that there is no reactant so reaction does not occur. Thus molecularity cannot be...
Given, A = {x: x ∈ W, x < 2}, B = {x : x ∈N, 1 < x < 5} C = {3, 5}; W is the set of whole numbers A = {x: x ∈ W, x < 2} = {0, 1} B = {x : x ∈N, 1 < x < 5} = {2, 3, 4} (i) (B∩C) =...
over the rectangular loop 1234 shown in the figure
over the surface bounded by loop 1234Solution: (a) $\oint_{\vec{E}} \cdot \overrightarrow{d l}=E_{0} h\left[\sin \left(k z_{2}-\omega t\right)-\sin \left(k z_{1}-\omega t\right)\right]$ (b) $\int \vec{B}.{\overrightarrow{d s}} =...
The two most important responses that occur according to the collision theory are that the energy is greater than the activation energy and the correct position of the reactant molecules during a...
In an elementary reaction both the molecularity and order must be same. So, the given reaction is not an elementary reaction as the order of the given reaction is different.
is placed symmetrically along the z-axis and has radius 
. The cable consists of a thin wire and a co-axial conducting tube. An alternating current 
sin 
flows down the central thin wire and returns along the co-axial conducting tube. The induced electric field at a distance 
from the wire inside the cable is 
. In 
, a) The displacement current density is given as $\vec{J}_{d}=\frac{2 \pi I_{0}}{\lambda^{2}} \ln \frac{a}{s} \sin 2 \pi v t \hat{k}$ b) Total displacement current will be, $I^{d}=\int J_{d} 2 \pi s...
SOLUTION: \[\begin{array}{*{35}{l}} x\text{ }+\text{ }2y\text{ }\le \text{ }3 \\ {} \\ \end{array}\] \[Line:\text{ }x\text{ }+\text{ }2y\text{ }=\text{ }3\] x 3 1 y 0 1 Also, (0, 0) satisfies...
Let us take a reaction, R → P t=0 R = Reactant P = Product Rate = k[R]0 t=t –dR/dt = k , dR =-kdt Integrate on both the sides, ʃDr = -k ʃdt [R] = -kt + I If, t = 0 [R]= [R0] Then, I= R0 [R] = [R0]–...
Let us take the rate of a reaction, Rate = k[A]α Multiplying the rate into twenty seven, 27 ˟ Rate = k[A]α Dividing the equations, α = 3 Hence, Order of the reaction = 3
The type of reaction that have the same value of order and molecularity is the elementary reaction. This type of reaction happens in only one step.
Rate law of a reaction can be determined by the formula, Rate = k[NO]2[O2]1 The rate law can be measured by the reaction rate as the initial concentration activity by keeping the concentration of...
Rate Equation of the reaction: k[A]0[B]0 The concentration capacity of the reactants will be equal to zero. In the zero-order reaction, the rate constant and rate of the reaction is the same....
Condition: A situation in which the order of a chemical reaction can be converted under it by taking a solvent or reactant at an exorbitant rate because its concentration does not change much. Let...
When the distance between two points is doubled, the intensity of light is reduced by one-fourth. Geometrical characteristics of the LASER are: a) unidirectional b) monochromatic c) coherent...
is used in satellite communication
is used to kill germs in water purifies
is used to detect leakage of oil in underground pipelines
is used to improve visibility in runaways during fog and mist conditionsa) i) $\lambda_{1}$ is a microwave, used in satellite communication. ii) $\lambda_{2}$ is UV rays, used in a water purifier for killing germs. iii) $\lambda_{3}$ is X-rays, used in improving the...
The correct answer is c) The intensity of light as seen through the Polaroid shall go through a minimum but not zero for two orientations of the polaroid
The correct answer is (a) be a fine sharp slit white in colour at the centre
The correct answer is c) there shall be no interference fringes
The correct answer is a) S1 and S2 have the same intensities b) S1 and S2 have a constant phase difference c) S1 and S2 have the same phase
(i) only one reacting species is involved in the rate-determining step. (ii) the order and the molecularity of the slowest step are equal to one. (iii) the molecularity of the reaction is one and...
The correct answer is b) different from a geometrical image d) diffused coloured region around a sharp central white spot
(i) order of an overall reaction is the same as molecularity of the slowest step. (ii) order of an overall reaction is less than the molecularity of the slowest step. (iii) order of an overall...
Solution: Hence, \[\begin{array}{*{35}{l}} 1\text{ }\le \text{ }y\text{ }<\text{ }2 \\ \Rightarrow ~1\text{ }\le \text{ }\left| x-\text{ }\text{ }2 \right|\text{ }<\text{ }2 \\ \end{array}\]...
Which of the following options are correct for this reaction? (i) Rate of reaction = Rate constant (ii) Rate of the reaction depends on the concentration of ammonia. (iii) Rate of decomposition of...
The correct answer is a) the size decreases b) the intensity increases
(i) energy is always released (ii) energy is always absorbed (iii) energy does not change (iv) reactants may be formed Correct Answers: (i) energy is always released (iv) reactants may be...
The correct answer is a) the wavefront is spherical b) the intensity decreases in proportion to the distance squared
(i) the fraction of molecules with most probable kinetic energy decreases at higher temperatures. (ii) the fraction of molecules with most probable kinetic energy increases at higher temperatures....
For longitudinal sound waves, Huygen's concept holds true.
(i) the area under the curve must not change with an increase in temperature. (ii) the area under the curve increases with increase in temperature. (iii) the area under the curve decreases with...
(i) Rate of a reaction increases with increase in temperature. (ii) Rate of a reaction increases with a decrease in activation energy. (iii) Rate constant decreases exponentially with an increase in...
Wavefront and ray orientations are perpendicular to each other. L1 is the source of parallel rays that produce I2 at the focal length of the lens in the diagram above. The created picture serves as...
(i) Catalyst provides an alternative pathway to a reaction mechanism. (ii) Catalyst raises the activation energy. (iii) A catalyst lowers the activation energy. (iv) Catalyst alters enthalpy change...
Correct Answers: Option (ii) Option (iv) Explanation: The graphs (ii) and (iv) represents a proper zero-order reaction.
Correct Answers: Option (i) Option (iv) Explanation: The graphs (i) and (iv) represents a proper first-order reaction.
The distance between the sun and the earth is known to be enormous. We also know that the sun is spherical and that it may be thought of as a point source of light that can be seen from a great...
Professor CV Raman demonstrated the radiation pressure property of EM waves.
. What is the average intensity of the beam?$\begin{array}{l} B_{0}=12 \times 10^{-8} \sin \left(1.20 \times 10^{7} z-3.60 \times 10^{15} \mathrm{t}\right) \mathrm{T} \\ \mathrm{B} 0=12 \times 10^{-8} \mathrm{~T} \\ \mathrm{lav}=1.71...
The concentration of either ‘A’ or ‘B’ was changed keeping the concentrations of one of the reactants constant and rates were measured as a function of initial concentration. Following results were...
(i) It catalyses the forward and backward reaction to the same extent. (ii) It alters ∆G of the reaction. (iii) It is a substance that does not change the equilibrium constant of a reaction. (iv) It...
(i) depends on the concentration of reactants present in a small amount. (ii) depends on the concentration of reactants present in excess. (iii) is independent of the concentration of reactants....
Correct Answer: Option (ii) Explanation: The graph in the option (ii) describes the change in concentration of reactants and products with time.
(i) the reverse reaction is involved. (ii) it is an elementary reaction. (iii) it is a sequence of elementary reactions. (iv) any of the reactants is in excess Correct Answers: (i) the...
(i) Order is the same as molecularity. (ii) Order is less than the molecularity. (iii) Order is greater than the molecularity. (iv) Molecularity can never be zero. Correct Answers: (i) Order...
The correct options are: b) moving in a circular orbit d) falling in an electric field
When the frequency of a photon drops, the wavelength of the photon rises. There are two alternative scenarios: case one, in which the photons have a shorter wavelength and the energy is consumed...
i)According to the question, the electron absorbs two protons with frequencies of v and v'= 2v, where v' is the frequency of the released electron. Emax = hv – ϕ0 ii) There is no emission since the...
The correct answer is c) will be less than the earlier value
The correct answer is d) electrons can be emitted with any energy, with a maximum of E0
nm (c) 
nm (d)
nmThe correct answer is b) 1.2 × 10–3 nm
As per the inquiry, \[P\left( n \right)\text{ }=\text{ }n3\text{ }\text{ }7n\text{ }+\text{ }3\] is distinguishable by 3. Along these lines, subbing various qualities for n, we get, \[P\left( 0...
Choose the correct options from the following:
a) the associated magnetic field is given as $B=\frac{1}{c}\left(E_{1} \hat{i}-E_{2} \hat{j}\right) \cos (k z-\omega t)$ d) the given electromagnetic waves is plane polarised
as the amplitude of its electric field vector. The electric field 
which transports significant energy from the source falls off as
c) $1 / \mathrm{r}$
c) $1: 1$
and 
represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of the electromagnetic wave is along
d) $E \times B$
bulb at a 
distance is E. The electric field intensity produced by the radiations coming from 
bulb at the same distance is
c) $\mathrm{E} / \sqrt{2}$
falls on a non-reflecting surface at normal incidence. If the surface has an area of 
, the total momentum delivered during 30 minutes is
b) $36 \times 10^{-4} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
is incident normally on a perfectly reflecting infinite wall at 
.
b)$E_{r}=E_{0} \hat{i} \cos (k z+\omega t)$
c) ultraviolet region
i) The first equation is in the form of conservation of energy ii) We get dt as positive when we integrate the equation from $0$ to $T$, which is possible when the phase difference is constant and...
The impedance $Z$ for the given circuit is represented as, $1 / \mathrm{Z}=\left[1 / \mathrm{R}^{2}+1 /(1 / \omega \mathrm{C}-\omega \mathrm{L})^{2}\right]^{1 / 2}$
,
. Another device has twice the values for 
, 
and 
. How are the answers affected?Impedance is given as Z = 25 ohms $635=25R^{2}/16$ a) Resistance can be calculated as, $R=\sqrt 25\times 16=\sqrt 400=20 ohms$ b) $X_{c}-X_{l}=-3R/4=-15ohms$ c) Main current will be...
Because capacitance reactance is inversely proportional to frequency, and capacitors have a tendency to pass high-frequency current while blocking low-frequency currents, the reactance delivered by...
Inductance L is given as 0.01 H Resistance R is given as 1 ohm Voltage is given as 200 V Frequency is given as 50 Hz Impedance is given Z = 3.3 ohms Phase difference will be 72 × π/180 rad 0.004 sec...
The phenomenon called Joule's law of heating is used to determine the ampere for an alternating current. According to Joule's law of heating in a one-ohm resistance, AC is the current produced in a...
Solution: a) The greatest amplitude of the power curve is equal to the product of the voltage and current amplitudes. As a result, curve A denotes power. b) Because the whole cycle in the graph...
Solution: $I_{rms}=1.6A$
a) When P < 0, then AC source's instantaneous power output can be negative. b) The average power output cannot be negative as $P_{av}>0$.
Solution: The effective impedance will be, $Z_{eq}=R_{1}+R_{3}$
The correct options are: (a) zero average current. (d) voltage and current possibly differing in phase φ such that |φ| < π/2.
The correct options are: (a) Here, the power factor cos 0, 0. φ ≥ ≥ P (b) The driving force can give no energy to the oscillator (P = 0) in some cases. (c) The driving force cannot syphon out (P...
The correct options are: (c) Resistor and a capacitor. (d) Only a capacitor.
(a) 1/ √2 A.
(i) 1.26 × 1015 s (ii) 2.52 × 1014 s (iii) 2.52 × 1028 s (iv) infinite Correct Answer: (iv) infinite Explanation: The time taken for the 100% completion of the reaction is...
(c) R = 15 Ω, L = 3.5 H, C = 30µF.
(i) It considers reacting molecules or atoms to be hard spheres and ignores their structural features. (ii) A number of effective collisions determine the rate of reaction. (iii) The collision of...
(b) 5 √3/2 A
(i) the same (ii) doubled (iii) quadrupled (iv) halved Correct Answer: (i) the same Explanation: For the given rate law of the reaction, if the concentration of reactant ‘B’ is doubled,...
(i) (a) only (ii) (b) only (iii) (c) only (iv) (a) and (b) Correct Answer: (i) (a) only Explanation: The graph (a) represents the exothermic reaction.
Correct Answer: Option (iii) Explanation: The third option shows the correct expression for the rate of the reaction.
(i) The rate of a reaction decreases over time as the concentration of reactants decreases. (ii) The rate of a reaction is the same at any time during the reaction. (iii) The rate of a reaction is...
(i) V5-V2/50-30 (ii) V4-V2/50-30 (iii) V3-V2/40-30 (iv) V3-V1/40-20 Correct Answer: (i) V5-V2/50-30 Explanation: V5-V2/50-30 do not show instantaneous rate of reaction at 40th...
(i) The order of a reaction can be a fractional number. (ii) Order of a reaction is experimentally determined quantity. (iii) The order of a reaction is always equal to the sum of the stoichiometric...
(i) Average rate up to 40s is V3-V2/40 (ii) Average rate up to 40s is V3-V2/40-30 (iii) Average rate up to 40 seconds is V3/40 (iv) Average rate up to 40 seconds is V3-V1/40-20 Correct...
(i) Rate constant increases exponentially with increasing activation energy and decreasing temperature. (ii) Rate constant decreases exponentially with increasing activation energy and decreasing...
Correct Answer: Option (i) Explanation: According to Arrhenius equation, the graph represented in the first option is a straight line with negative slope.
The initial pressure of the system before decomposition of A was pi. After lapse of time ‘t’, total pressure of the system increased by x units and became ‘pt The rate constant k for the reaction is...
(i) The activation energy of forwarding reaction is E1 + E2 and the product is less stable than reactant. (ii) The activation energy of forwarding reaction is E1+E2and product is more stable than...
The areal velocity of mars around the sun does not change while it revolves around the sun, according to Kepler's law. As a result, the areal velocity versus time graph is a straight line.
(i) determining the rate constant at standard temperature. (ii) determining the rate constants at two temperatures. (iii) determining the probability of collision. (iv) using catalyst. ...
(i) increases. (ii) decreases. (iii) remains unchanged. (iv) may increase or decrease. Correct Answer: (iii) remains unchanged Explanation: The enthalpy change of the reaction will not be...
(i) gibbs energy of reaction. (ii) enthalpy of reaction. (iii) activation energy of reaction. (iv) equilibrium constant. Correct Answer: (iii) activation energy of reaction Explanation: The...
Zinc leaves behind the electrons on Electrode A during the reaction giving a negative charged whereas the Copper deposits on the Electrode B with positive charge. The polarity of electrode A...
The concentration of ions is kept constant with the alternating current whereas the concentration of ion changes a lot in the direct current. So, the alternating current is used for measuring the...
If the opposing potential is equal to electrical potential, then the cell reaction and the current flow through the cell will be stopped leading to no chemical reaction.
Reaction on Cathode - H2O(l ) + e–→ 1/2 H2(g) + OH– (aq) Reaction on Anode - Cl– (aq) → 1/2 Cl2(g) + e– Complete Reaction: NaCl(aq)+H2O(l)→NaOH(aq)+H2(g)+Cl2(g) NaOH turns the brine solution basic...
The electrolyte is not consumed in the cell and so the current gets delivered at a constant potential till the end. The reaction contains no ions whose concentration can change over time. Thus, the...
Electrolyte B - strong electrolyte During dilution the number of ions remains the same and the interionic attraction decreases. Thus, the increase in Λm is small.
Reaction on Anode - 2H2O(l)→ O2(g) + 4H+ (aq) + 4e– Reaction on Cathode - 4H+ + 4e-→ 2H2 Complete Reaction: 2H2O(l) → O2(g) + 2H2(g) The pH will not be affected and stays the same.
In an aqueous solution, when water is added the electrolyte gets diluted thus leading to the decrease in the specific conductivity of the electrolytes.
The reference electrode which is used to measure the electrode potential of other electrodes is the Standard hydrogen electrode (SHE) which has a value of zero.
Reaction in Anode: Oxidation half-cell Cu(s) → Cu2+ + 2e- Reaction in Cathode: Reduction half-cell Cl2(g)+ 2e-→ 2Cl- Hence, the anode Cu gets oxidised in this cell reaction.
Nernst Equation: Ecell = E°cell – RT[Zn2+]/ nF[Cu2+] Galvanic cell reaction: Zn(s)|Zn2+(aq)||Cu2+(aq)|Cu(s) Reaction in Anode: oxidation half-cell Zn(s) → Zn2+ (aq)+ 2e Reaction in Cathode:...
Advantages of Fuel cells: 1.Fuel cells can convert the energy of combustion of fuels like hydrogen, methanol into electrical energy. 2.Fuel cells can run continuously as long as reactants are...
While discharging the battery, the water dilutes the concentration of the dilute sulphuric acid which leads to a decrease in the density of the solution. Reaction Involved: Pb(s)+PbO2(s)+2H2SO4(aq)→...
Weak Electrolyte: CH3COOH Strong Electrolyte: CH3COONa . When diluted, the dissociation degree increases, and the number of ions present also increases which leads to the drastic increase of CH3COOH...
Electrode potential is the potential difference which is developed between the electrode and the electrolyte.
The oxidation of water to oxygen is kinetically not good and requires a lot of energy which is said to have more energy. What can be very powerful is the excess energy needed to drive the reaction...
In the cell reaction Cu + 2Ag+→ 2Ag + Cu2+, Anode is the oxidation half-cell Reaction - Cu → Cu2+ + 2e- Cathode is the reduction half-cell Reaction - 2Ag+ + 2e- →2Ag
W = itE/96500 W = 1×10×60×31.75/96500 Equivalent mass of Cu2+ and Ag+ is different so that the mass of copper and silver deposited will not be same.
The disadvantage is that hydrogen gas is much more stable than reduced species. Here, the reduced form (Zn) is unstable. It is difficult to reduce Zn2 + to Zn. Therefore, distortion is more likely...
Electrolysis happens when a redox reaction happens. On equilibrium, the cell is completely depleted, and the cell's energy drops to zero. ∆rG= -nF E cell =0
A cell of E ° or G G ° cannot be equal to zero. The only standard electrode power is randomly assigned is the standard hydrogen electrode (SHE). As everything else is measured in relation to SHE;...
No. It cannot be measured. We can only estimate the electrode power difference between two and a half cells. We can also estimate the potential electrode differences associated with a standard...
(i) Mg is cathode (ii) Cu is cathode (iii) The cell reaction is Mg + Cu2+ → Mg2+ + Cu (iv) Cu is the oxidising agent Correct Answers: (ii) Cu is cathode (iii) The cell reaction is Mg + Cu2+ →...
(i) temperature. (ii) distance between electrodes. (iii) the concentration of electrolytes in solution. (iv) the surface area of electrodes. Correct Answers: (i) temperature. (iii) the...
(i) 1/R l/A (ii) G*/R (iii) ˄m (iv) l/A Correct Answers: (i) 1/R l/A (ii) G*/R Explanation: Conductivity κ , is equal to 1/R l/A & G*/R
(i) Copper will deposit at the cathode. (ii) Copper will dissolve at the anode. (iii) Oxygen will be released at anode. (iv) Copper will deposit at the anode. Correct Answers: (i) Copper will...
(i) Copper will deposit at the cathode. (ii) Copper will deposit at the anode. (iii) Oxygen will be released at anode. (iv) Copper will dissolve at the anode Correct Answers: (i) Copper will...
(i) ˄0m(HCl) + ˄0m(NaOHl) – ˄0m(NaCl) (ii) ˄0m(HNO3) + ˄0m(NaNO3) – ˄0m(NaOH) (iii) ˄0m(HNO3) + ˄0m(NaOH) – ˄0m(NaNO3) (iv) ˄0m(NH4OH) + ˄0m(HCl) – ˄0m(NH4Cl) Correct Answers: (i) ˄0m(HCl) +...
(i) nature of electrolyte. (ii) the concentration of electrolyte. (iii) power of AC source. (iv) distance between the electrodes. Correct Answers: (i) nature of electrolyte. (ii) the...
(i) 1.1 = Kc (ii) 2.303RT/2F logKc = 1.1 (iii) log Kc = 2.2/0.059 (iv) log Kc = 1.1 Correct Answers: (ii) 2.303RT/2F logKc = 1.1 (iii) log Kc = 2.2/0.059
(a) H+(aq) + e– →1/2H2(g) ; E°cell = 0.00V (b) 2H2O (l) → O2 (g) + 4H+(aq) + 4e–: E°cell = 1.23V (c) 2SO42– (aq) → S2O82– (aq) + 2e– ; E°cell = 1.96V (i) In dilute sulphuric acid solution, hydrogen...
(i) this redox couple is a stronger reducing agent than the H+/H2 couple. (ii) this redox couple is a stronger oxidising agent than H+/H2. (iii) Cu can displace H2 from acid. (iv) Cu cannot displace...
(i) Na+(aq) + e– → Na (s); E°Cell = –2.71V (ii) 2H2O (l) → O2(g) + 4H+(aq) + 4e– : E°Cell = 1.23V (iii) H+(aq) + e–→1/2H2 (g); E°Cell = 0.00V (iv) Cl–(aq) →1/2Cl2(g) + e– ; E°Cell = 1.36V ...
(i) ˄0m(NH4OH) + ˄0m(NH4Cl) – ˄0(HCl) (ii) ˄0m(NH4Cl) + ˄0m(NaOH) – ˄0(NaCl) (iii) ˄0m(NH4Cl) + ˄0m(NaCl) – ˄0(NaOH) (iv) ˄0m(NaOH) + ˄0m(NaCl) – ˄0(NH4Cl) Correct Answer: (ii) ˄0m(NH4Cl) +...
(i) PbSO4 anode is reduced to Pb (ii) PbSO4 cathode is reduced to Pb (iii) PbSO4 cathode is oxidised to Pb (iv) PbSO4 anode is oxidised to PbO2 Correct Answer: (i) PbSO4 anode is reduced to...
(i) changes with the change of electrolyte. (ii) changes with the change of concentration of electrolyte. (iii) changes with the temperature of the electrolyte. (iv) remains constant for a cell....
(i) 1F (ii) 6F (iii) 3F (iv) 2F Correct Answer: (iii) 3F Explanation: 3F of charge is required to obtain 1 mole of Al from the Al2O3
(i) Cr3+ (ii) MnO4– (iii) Cr2O72– (iv) Mn2+ Correct Answer: (i) Cr3+ Explanation: Cr3+ is the most stable oxidised species when compared to the rest of the options.
(i) Cl– (ii) Cr3+ (iii) Cr (iv) Mn2+ Correct Answer: (iv) Mn2+ Explanation: Mn2+ in its reduced form is observed to be more stable.
(i) Cr3+ < Cl–< Mn2+ < Cr (ii) Mn2+ < Cl–< Cr3+ < Cr (iii) Cr3+ < Cl–< Cr2O72– < MnO4– (iv) Mn2+ < Cr3+ < Cl–< Cr Correct Answer: (ii) Mn2+ < Cl–<...
(i) Cl– (ii) Mn2+ (iii) MnO4– (iv) Cr3+ Correct Answer: (iii) MnO4– Explanation: The higher the value of the normal reduction of the strength of the metal ion, the higher will be its...
EᶱCr2O72-/Cr3+ = 1.33V EᶱMnO4–/Mn2+ = 1.51V EᶱCl2/Cl– = 1.36V EᶱCr3+/Cr = -0.74V (i) Cl– (ii) Cr (iii) Cr3+ (iv) Mn Correct Answer: (ii) Cr Explanation: The most powerful reducing agent is...
(i) The conductivity of the solution depends upon the size of ions. (ii) Conductivity depends upon the viscosity of the solution. (iii) Conductivity does not depend upon solvation of ions present in...
(i) Ecell = 0 (ii) Ecell > Eext (iii) Eext > Ecell (iv) Ecell = Eext Correct Answer: (iii) Eext > Ecell
(i) It does not participate in the cell reaction. (ii) It provides surface either for oxidation or for the reduction reaction. (iii) It provides a surface for conduction of electrons. (iv) It...
(i) Cell potential (ii) Cell emf (iii) Potential difference (iv) Cell voltage Correct Answer: (ii) Cell emf Explanation: Electromotive force or e.m.f. is the power provided by the cell or...
(i) ECell and ∆rG of cell reaction both are extensive properties. (ii) ECell and ∆rG of cell reaction both are intensive properties. (iii) ECell is an intensive property while ∆rG of cell reaction...
Correct Answer: Option (ii)
(i) Pt (s) H2(g,0.1 bar) H+ (aq.,1 M) Cu2+(aq.,1M) Cu (ii) Pt(s) H2 (g, 1 bar) H+ (aq.,1 M) Cu2+ (aq.,2 M) Cu (iii) Pt(s) H2(g, 1 bar) H+ (aq.,1 M) Cu2+ (aq.,1 M) Cu (iv) Pt(s) H2 (g, 1 bar)...
Column I Column II (i) Mass percentage (a)Number of moles of the solute component/ The volume of solution in litres (ii) Volume percentage (b) Number of moles of a component/...
Column I Column II (i) Raoult’s law (a) ∆Tf= Kfm (ii) Henry’s law (b) Π = CRT (iii) Elevation of boiling point (c) p = x1P10+ X2P20 (iv) Depression in freezing point (d) ∆Tb= Kbm (v) Osmotic...
Column I Column II (i) Soda water (a) A solution of the gas in solid (ii) Sugar solution (b) A solution of the gas in gas (iii) German silver (c) A solution of...
Column I Column II (i) Saturated solution (a) Solution having the same osmotic pressure at a given temperature as that of the given solution. (ii) Binary solution (b) A solution whose...
Examples: Cellulose acetate Polyamides
Semi-permeable membrane is a membrane that allows only the movement of solvent molecules but not solute molecules. Examples: Cellulose acetate and phospholipid bilayer in biological cells.
Salt is an agent for de-icing and can be used to dissolve ice. If the freezing point is lowered the ice begins to melt. Thus, the addition of salt to ice reduces the freezing point from O ℃ drop.
An example of water and glucose can be taken to illustrate this. In water, the surface of this liquid will settle with water molecules. If we put glucose into it, some of these areas will be...
(i) At specific composition, methanol-acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoult’s law. (ii) At specific composition, methanol-acetone mixture...
(a) (i) The bend is a condition that occurs in scuba divers. They have to breathe air under high pressure under water. Nitrogen gas does not dissolve in normal pressure. Under water, they will...
Because of the availability of O2 and the presence of more solubility in the cold water makes the aquatic species feel more comfortable when present in the cold water.
Significance of Henry’s Law constant KH: Henry's law states that in the solution, "the pressure in the gas component at the vapor fraction (p) is equal to the fraction of the gas molecule (x) in...
Any change in the temperature causes a change in the volume, so it changes the molarity of the solution. Therefore, terms such as high percentage, ppm, mole fraction, and molality of a solution are...
"Like dissolves like" term is used when the solvent dissolves in the solvent if its interactions between molecules are the same. This is because polar solutions can be dissolved in polar solvents...
Adding 1 mol of NaCl to 1 liter of water, a point of boiling water rises, while the addition of 1 mol of methyl alcohol to one liter of water reduces its boiling point because when added to a stable...
An azeotropic mixture is shown when both the liquids A & B starts coming in the distillate and the vapour and liquid phase will have the same composition. Via distillation an azeotropic mixture...
(i) a non-volatile solid is dissolved in a volatile liquid. (ii) a non-volatile liquid is dissolved in another volatile liquid. (iii) a gas is dissolved in non-volatile liquid. (iv) a volatile...
Correct Answers: Option (ii) Option (iv) Explanation: For the binary solution, the difference in vapor pressure versus the composition of the solution is given in graphs B and D where, the...
(i) solute and solvent both are same. (ii) osmotic pressure is the same. (iii) solute and solvent may or may not be same. (iv) a solute is always the same solvent may be different. Correct...
(i) Benzene – Toluene (ii) Water-Nitric acid (iii) Water-Ethanol (iv) n-Hexane – n-Heptane Correct Answers: (ii) Water-Nitric acid (iii) Water-Ethanol Explanation: In a particular...
(i) solute (ii) density (iii) elevation in boiling point (iv) depression in freezing point Correct Answers: (iii) elevation in boiling point (iv) depression in freezing point Explanation:...
(i) i = Normal molar mass/Abnormal molar mass (ii) i = Abnormal molar mass/ Normal molar mass (iii) i= Observed colligative property/calculated colligative property (iv) i = Calculated colligative...
(i) It depends on the concentration of a non-electrolyte solute in a solution and does not depend on the nature of the solute molecules. (ii) It depends on a number of particles of electrolyte...
(i) ∆mix H = zero (ii) ∆mix V = zero (iii) These will form a minimum boiling azeotrope. (iv) These will not form the ideal solution. Correct Answers: (iii) These will form a minimum boiling...
(i) (a) and (c) at constant T (ii) (a) and (b) at constant P (iii) (b) and (c) only (iv) (c) only Correct Answers: (i) (a) and (c) at constant T (ii) (a) and (b) at constant P Explanation: At...
(i) HCHO < CH4< CO2 < Ar (ii) HCHO < CO2< CH4< Ar (iii) Ar < CO2< CH4< HCHO (iv) Ar < CH4 < CO2 < HCHO Correct Answer: (iii) Ar < CO2< CH4< HCHO...
(i) 0.004 (ii) 0.008 (iii) 0.012 (iv) 0.016 Correct Answer: (iv) 0.016 Explanation: Let us take, M1 and V1 - molarity and volume of the given solution. M2 and V2 - molarity and volume of...
(i) A–B interactions are stronger than those between A–A or B–B. (ii) vapour pressure of solution increases because more number of molecules of liquids A and B can escape from the solution. (iii)...
(i) the vapour pressure in container (A) is more than that in a container (B). (ii) the vapour pressure in container (A) is less than that in the container (B). (iii) vapour pressure is equal in...
(A) In bromoethane and chloroethane mixture intermolecular interactions of A–A and B–B type are nearly the same as A–B type interactions. (B) In ethanol and acetone mixture A–A or B–B type...
(i) iA< iB< iC (ii) iA> iB> iC (iii) iA= iB= iC (iv) iA<iB> iC Correct Answer: (iii) iA= iB= iC
(i) water will move from the side (A) to side (B) if a pressure lower than the osmotic pressure is applied on piston (B). (ii) water will move from the side (B) to side (A) if a pressure greater...
(i) greater for gases with higher solubility. (ii) greater for gases with lower solubility. (iii) constant for all gases. (iv) not related to the solubility of gases Correct Answer: (ii)...
(i) increases with increase in temperature. (ii) decreases with increase in temperature. (iii) remains constant. (iv) first increases then decrease. Correct Answer: (i) increases with...
(i) Units of atmospheric pressure and osmotic pressure are the same. (ii) In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute...
(i) 2, 2 and 2 (ii) 2, 2 and 3 (iii) 1, 1 and 2 (iv) 1, 1 and 1 Correct Answer: (ii) 2, 2 and 3 Explanation: The values of van't Hoff factors for KCl,...
(i) Two different solutions of sucrose of the same molality prepared in different solvents will have the same depression in freezing point. (ii) The osmotic pressure of a solution is given by the...
(i) is higher than that at a dilute solution. (ii) is lower than that of a dilute solution. (iii) is same as that of a dilute solution. (iv) cannot be compared with an osmotic pressure of a dilute...
(i) it gains water due to osmosis. (ii) it loses water due to reverse osmosis. (iii) it gains water due to reverse osmosis. (iv) it loses water due to osmosis. Correct Answer: (iv) it loses...
(i) the same (ii) about twice (iii) about three times (iv) about six times Correct Answer: (iii) about three times Explanation: The depression in freezing point of a 0.01M MgCl2 solution is...
(i) K kg mol-1 or K (molality)-1 (ii) mol kg K-1 or K-1(molality) (iii) kg mol-1 K-1 or K-1(molality)-1 (iv) K mol kg-1 or K (molality) Correct Answer: (i) K kg mol-1 or K (molality)-1...
(i) 1.0 M NaOH (ii) 1.0 M Na2SO4 (iii) 1.0 M NH4NO3 (iv) 1.0 M KNO3 Correct Answer: (ii) 1.0 M Na2SO4 Explanation: Given that a large amount of van's Hoff will increase the boiling point of...
(i) the nature of the solute particles dissolved in solution. (ii) the number of solute particles in solution. (iii) the physical properties of the solute particles dissolved in solution. (iv) the...
(i) Methanol and acetone. (ii) Chloroform and acetone. (iii) Nitric acid and water. (iv) Phenol and aniline. Correct Answer: (i) Methanol and acetone Explanation: The mixture of methanol and...
(i) low temperature (ii) low atmospheric pressure (iii) high atmospheric pressure (iv) both low temperature and high atmospheric pressure Correct Answer: (ii) low atmospheric pressure...
(i) Temperature (ii) Nature of solute (iii) Pressure (iv) Nature of solvent Correct Answer: (iii) Pressure Explanation: Changes in pressure do not affect the solubility of solids and the...
(i) saturated (ii) supersaturated (iii) unsaturated (iv) concentrated Correct Answer: (ii) supersaturated Explanation: Most of the substance does not dissolve when we add more solute will not...
(i) less than the rate of crystallisation (ii) greater than the rate of crystallisation (iii) equal to the rate of crystallisation (iv) zero Correct Answer: (iii) equal to the rate of...
(i) Sugar crystals in cold water. (ii) Sugar crystals in hot water. (iii) Powdered sugar in cold water. (iv) Powdered sugar in hot water. Correct Answer: (iv) Powdered sugar in hot water...
(i) mole fraction (ii) parts per million (iii) mass percentage (iv) molality Correct Answer: (i) mole fraction Explanation: According to Raoult's law, the reduction associated with vapor...
I1 is measured as = 10 mA = IGG = (I1 – IG)(S1 + S2 + S3) I2 is measured as = 100 mA = IG(G+S1)=(I2-IG)(S2-S3) I3 is measured as = 1 A = IG(G+S1+S2)=(I3-IG)(S3) S1 = 1 Ω S2 = 0.1 Ω S3 = 0.01...
a) show that
monotonically increases with L b) use an appropriate Amperian loop to that
where I is the current in the wire c) verify directly the above result d) suppose we replace the circular coil by a square coil of sides R carrying the same current I. What can you say about
a) A circular current-carrying loop's magnetic field is given as \(\Im (L)=\int_{-L}^{+L}{Bdl}=2Bl\) It is a L function that increases monotonically. b) The Amperian loop is defined as follows:...
Solution: Thallium and boron have a place with bunch 13 of the intermittent table and +1 oxidation state turns out to be more steady as we drop down the gathering. Boron is more steady than thallium...
The spiral route is formed by the fields E and B in their current configuration.
The quarter's vector sum of the magnetic field at the origin is given as \({{\vec{B}}_{net}}=\frac{1}{4}\left( \frac{{{\mu }_{0}}I}{2R} \right)(\widehat{i}+\widehat{j}+\widehat{k})\)
The time period of the radio frequency is halved when the frequency is doubled, resulting in a half revolution of the charges.
b) the value of
c) there may be a point on C where B and dl are perpendicular d) B vanishes everywhere on Cb) the value of \(\oint\limits_{c}{B.dl\) is independent of sense of C c) there may be a point on C where B and dl are perpendicular
a) independent of which orbit it is in b) negative