Download App

Chemical Kinetics Chemistry - Chemical Kinetics

Maharashtra Board - STD 12 Science - Chemistry (MSBSHSE - English Medium). 267 questions in this chapter.

Question types

Chemical Kinetics question types

267 questions across 5 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

267
Questions
5
Question groups
5
Question types
Sample Questions

Chemical Kinetics questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark
For the reaction, $2 NO _2( g ) \longrightarrow 2 NO _{( g )}+ O _{2( g )}, \quad \frac{ d \left[ NO _2\right]}{ dt } \text { is } 1.3 \times 10^{-5} mol L ^{-1} sec ^{-1} \text {. }$ What is rate of formation of $O _2$ ?
  • A
    $1.62 \times 10^{-6} mol L ^{-1} sec ^{-1}$
  • ✓
    $6.5 \times 10^{-6} mol L ^{-1} sec ^{-1}$
  • C
    $1.3 \times 10^{-6} mol L ^{-1} sec ^{-1}$
  • D
    $3.25 \times 10^{-6} mol L ^{-1} sec ^{-1}$

Answer: B.

View full solution →
Q 2MCQ1 Mark
Rate of reaction for $2 X + Y \rightarrow 2 W + Z$ is $1.2 \times 10^{-4}\ mol\ dm ^{-3} \sec ^{-1}$ when $[X]=[Y]=0.6\ mol\ dm ^{-3}$. Calculate value of rate constant if reaction is first order in $X$ and zeroth order in $Y$.
  • A
    $2 \times 10^{-4} mol\ dm ^{-3} \sec ^{-1}$
  • ✓
    $6 \times 10^{-3} mol\ dm ^{-3} \sec ^{-1}$
  • C
    $1.8 \times 10^{-3} mol\ dm ^{-3} \sec ^{-1}$
  • D
    $1.2 \times 10^{-4} mol\ dm ^{-3} \sec ^{-1}$

Answer: B.

View full solution →
Q 3MCQ1 Mark
What is rate constant of a first order reaction if time required to decrease concentration of reactant from $1.6 M$ to $0.4 M$ is 12 hour?
  • A
    0.78 hour $^{-1}$
  • ✓
    0.116 hour $^{-1}$
  • C
    0.4 hour $^{-1}$
  • D
    0.167 hour $^{-1}$

Answer: B.

View full solution →
Q 4MCQ1 Mark
What is the correct relation between rate constant and half life of a zero order reaction?
  • A
    $k =\frac{2[ A ]_0}{ t _{1 / 2}}$
  • B
    $k =[ A ]_0 \times t _{1 / 2}$
  • C
    $k=\frac{[A]_0}{t_{1 / 2}}$
  • ✓
    $k=\frac{[A]_0}{2 t_{1 / 2}}$

Answer: D.

View full solution →
Q 5MCQ1 Mark
Rate of first order reaction $A \rightarrow$ product is $0-01\ mol\ dm ^{-2}\ s ^{-2}$, calculate rate constant if concentration of reactant is $0.2 M$ ?
  • A
    $0.1 \sec ^{-1}$
  • B
    $0-01 \sec ^{-1}$
  • ✓
    $0.05 \sec ^{-1}$
  • D
    $0.5 \sec ^{-1}$

Answer: C.

View full solution →
Q 6Answer the following in one or two sentence.2 Marks
The rate law for the reaction $A + B \rightarrow C$ is found to be rate $= k [A]^2 \times [B]$. The rate constant of the reaction at $25 ^\circ\ C$ is $6.25 M^{-2} S^{-1}$. What is the rate of reaction when $[A] = 1.0 mol dm^{-3}$ and $[B] = 0.2 mol dm^{-3}$?
View full solution →
Q 12Answer the following in brief.3 Marks
For the reaction,
$CH _3 Br ( aq )+ OH -( aq ) \rightarrow CH _3 OH ^{\ominus}( aq )+ Br ^{\ominus}( aq )$, rate law is rate $= k \left[ CH _3 Br \right]\left[ OH ^{\ominus}\right]$
a. How does reaction rate changes if $\left[ OH ^{\ominus}\right]$ is decreased by a factor of $5$ ?
b. What is change in rate if concentrations of both reactants are doubled?
View full solution →
Q 14Answer the following in brief.3 Marks
The rate of the reaction $2 A+B \rightarrow 2 C+D$ is $6 \times 10^{-4} mol dm ^{-3} s^{-1}$ when $[A]=[B]=0.3 mol dm ^{-3}$ If the reaction is of first order in $A$ and zeroth order in $B$ , what is the rate constant?
View full solution →
Browse all question groups ↑

Generate a Chemical Kinetics paper free

Pick question groups from the list above, set marks and difficulty, and export a branded PDF with step-by-step answer keys. First 3 chapters free — no signup.

Download App
Generate Paper FreeAll Chemistry chapters