Chemical Kinetics-based on the concept of differential and integral rate equations is one of the most crucial and important topics in Chemistry. This post Chemical Kinetics NEET Questions (Integrated Rate Equations) is a compilation of various questions based on NEET and AIIMS pattern with revision notes and detailed solutions.

## Chemical Kinetics NEET Questions (Integrated Rate Equations)

**1****. What is the integrated rate equat****ion for a first order reaction?**

a) [A] = [A]_{0}e^{-kt}

b) [A] = [A]_{0}/e^{-kt}

c) [A] = [A]_{0}e^{-t}

d) [A] = [A]_{0}e^{-k}

**Answer: **[A] = [A]_{0}e^{-kt}

**2****. For a certain reaction the values of Arrhenius factor and Activation energy are 4 x 10**^{13}** collision/sec and 98.6KJ/mol at 303K. Calculate the rate constant if reaction is 1**^{st}** order?( R=8.341mol**^{-1}**K**^{-1}**)**

^{13}

^{st}

^{-1}

^{-1}

a) 6.07 x 10^{-3}

b) 3.02 x 10^{-5}

c) 4.07 x 10^{-4}

d) 7.42 x 10^{-3}

**Answer: **4.07 x 10^{-4}

**3****. The decomposition of N**_{2}**O**_{5}** in CCl**_{4}** solution was studied. N**_{2}**O**_{5}** → 2NO**_{2}** + 1/2O**_{2}**. The rate constant of the reaction is 6.2 x 10**^{-4}** sec**^{-1}**. Calculate the rate when the concentration of N**_{2}**O**_{5}** is 1.25 molar.**

_{2}

_{5}

_{4}

_{2}

_{5}

_{2}

_{2}

^{-4}

^{-1}

_{2}

_{5}

a) 6.45 x 10^{-4}

b) 7.45 x 10^{-4}

c) 6.75 x 10^{-4}

d) 7.75 x 10^{-4}

**Answer: **7.75 x 10^{-4}

**4****. What is the formula to calculate the time taken for the compl****etion of a zero-order reaction?**

a) t_{100%} = [A]_{0}/k

b) t_{100%} = [A]_{0}/2k

c) t_{100%} = 2[A]_{0}/k

d) t_{100%} = [A]_{0}/3k

**Answer: **t_{100%} = [A]_{0}/k

**5****. The unit of rate constant of a first-order reaction is s**^{-1}**.**

^{-1}

a) True

b) False

**Answer: **True

**6****. The unit of the rate constant of a zero-order reaction and**** second-order reaction is same.**

a) True

b) False

**Answer: **False

**7****. The half-life of a given reaction is doubled if the initial concentration of the reactant is doubled. Wha****t is the order of the reaction?**

a) 0

b) 1

c) 2

d) 3

**Answer: **0

**8****. A first-order reaction was 70 percent complete in 20 minutes. What is the**** rate constant of the reaction?**

a) 0.07 min^{-1}

b) 0.06 min^{-1}

c) 0.08 min^{-1}

d) 0.09 min^{-1}

**Answer: **60.28 minutes

**9****. What is the time taken to complete 75 percent of the reaction if the rate of the first-order reaction is 0.023 min**^{-1}**?**

^{-1}

a) 60.28 minutes

b) 69.28 minutes

c) 50.37 minutes

d) 65.97 minutes

**Answer: **60.28 minutes

**1****0****. For the reaction X → Y + Z, the rate constant is 0.00058 s**^{-1}**. What percentage of X wi****ll be decomposed in 50 minutes?**

^{-1}

a) 90.02 percent

b) 82.44 percent

c) 88.82 percent

d) 82.67 percent

**Answer: **82.44 percent

**1****1****. What is the time required for 75 percent comple****tion of a first-order reaction?**

a) 3 × t_{50}

b) 4 × t_{50}

c) 4.5 × t_{50}

d) 2 × t_{50}

**Answer: **2 × t_{50}

**1****2****. A first-order reaction is 50 percent complete in 30 minutes. Calculate the time taken for completion of 87.5 ****percent of the reaction.**

a) 30 minutes

b) 60 minutes

c) 90 minutes

d) 120 minutes

**Answer: **90 minutes

**1****3****. The rate constant of a reaction is 0.01s**^{-1}**, how much time does it take for 2.4 mol L**^{-1}** concentration of reactant reduced to 0.3 mol L**^{-1}**?**

^{-1}

^{-1}

^{-1}

a) 108.3s^{-1}

b) 207.9s^{-1}

c) 248.2s^{-1}

d) 164.8s^{-1}

**Answer: **207.9s^{-1}

**14****. What time does it take for reactants to reduce to 3/4 of initial concentration if the rate constant is 7.5 x 10**^{-3}** s**^{-1}**?**

^{-3}

^{-1}

a) 38.4s

b) 40.2s

c) 39.3s

d) 36.8s

**Answer: **38.4s

**15****. A zero-order reaction is 25% complete in 30seconds. What time d****oes it take for 50% completion?**

a) 40s

b) 70s

c) 50s

d) 60s

**Answer: **60s