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Chemical Kinetics Class 12 Chemistry MCQs Pdf
Chemical Kinetics MCQ Class 12
1. What will be the fraction of molecules having energy equal to or greater than activation energy, Ea?
(a) K
(b) A
(c) Ae-Ea/Rt
(d) e-Ea/Rt
Answer
Answer: d
Chemical Kinetics Class 12 MCQ
2. 
What type of reaction is this?
(a) Second order
(b) Unimolecular
(c) Pseudo-unimolecular
(d) Third order
Answer
Answer: c
MCQ Questions For Class 12 Chemistry Chapter 4
3. Which among the following is a false statement?
(a) Rate of zero order reaction is independent of initial concentration of reactant.
(b) Half life of a third order reaction is inversely proportional to square of initial concentration of the reactant.
(c) Molecularity of a reaction may be zero or fraction.
(d) For a first order reaction, \(t_{1 / 2}=\frac{0.693}{\mathrm{K}}\)
Answer
Answer: c
MCQ On Chemical Kinetics Class 12
4. Which of the following statements about the catalyst is true?
(a) A catalyst accelerates the rate of reaction by bringing down the activation energy.
(b) A catalyst does not participate in reaction mechanism.
(c) A catalyst makes the reaction feasible by making ∆G more negative.
(d) A catalyst makes equilibrium constant more favourable for forward reaction.
Answer
Answer: a
Chapter 4 Chemistry Class 12 MCQs
5. An endothermic reaction with high activation energy for the forward reaction is given by the diagram.
Answer
Answer: c
Class 12 Chemistry Chapter 4 MCQ
6. For the reaction N2 + 3H2 → 2NH3 if \(\frac{\Delta\left[\mathrm{NH}_{3}\right]}{\Delta t}\) = 2 × 10-4 mol L-1s-1, the value of \(\frac{-\Delta\left[\mathrm{H}_{2}\right]}{\Delta t}\) would be
(a) 1 × 10-4 mol L-1s-1
(b) 3 × 10-4 mol L-1s-1
(c) 4 × 10-4 mol L-1s-1
(d) 6 × 10-4 mol L-1s-1
Answer
Answer: b
Chemical Kinetics Class 12 MCQ Questions
7. The rate of a certain hypothetical reaction
A + B + C → products
is given by r = \(\frac{-d[\mathbf{A}]}{d t} \mathbf{K}[\mathbf{A}]^{1 / 2}[\mathbf{B}]^{1 / 3}[\mathbf{C}]^{1 / 4}\). The order of the reaction is
(a) 13/11
(b) 13/14
(c) 12/13
(d) 13/12
Answer
Answer: d
MCQs Of Chemical Kinetics Class 12
8. In the formation of S02 by contact process;
2SO2 + O2 → 2SO3, the rate of reaction was measured as \(\frac{-d\left[\mathrm{O}_{2}\right]}{d t}\) = 2.5 × 10-4 mol L-1s-1. at
The rate of formation of of S03 will be
(a) -5.0 × 10-4 mol L-1s-1
(b) -1.25 × 10-4 mol L-1s-1
(c) 3.75 × 10-4 mol L-1s-1
(d) 5.00 × 10-4 mol L-1s-1
Answer
Answer: d
MCQ On Chemical Kinetics Class 12 Pdf
9. For a chemical reaction A→B, it is found that the rate of reaction doubles when the concentration of A is increased four times. The order of reaction is
(a) Two
(b) One
(c) Half
(d) Zero
Answer
Answer: c
Chemical Kinetics MCQ With Solution
10. The half life of the first order reaction having rate constant K = 1.7 x 10-5s-1 is
(a) 12.1 h
(b) 9.7 h
(c) 11.3 h
(d) 1.8 h
Answer
Answer: c
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