The rate law for the dimerisation of NO 2 into N 2 O 4 is - d NO 2 dt = k NO 2 2 Which of the following changes will change the value of the specific rate constant k ?

Changing the volume of the flask.

Rate constant k = 1 . 2 × 10 3 mol - 1 L s - 1 and E a = 2 . 0 × 10 2 k J mol - 1 , when T → ∞ , then-

A = 1 . 2 × 10 3 mol - 1 L s - 1

A = 2 . 0 × 10 2 mol - 1 L s - 1

A = 2 . 4 × 10 3 mol - 1 L s - 1

For the reaction, 2 A + B → products, when the concentration of A and B both were doubled, the rate of the reaction increased from 0.3 m o l L - 1 s - 1 to 2.4 m o l L - 1 s - 1 . When the concentration of A alone is doubled, the rate increased from 0.3 m o l L - 1 s - 1 to 0.6 m o l L - 1 s - 1 . Which one of the following statements is correct?

Order of the reaction with respect to B is 2

Total order of the reaction is 4

Order of the reaction with respect to A is 2

Order of the reaction with respect to B is 1

E M B I B E

Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 7

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The accompanying figure depicts the change in concentration of species $A$ and $B$ for the reaction $A \to B,$ as a function of time, the point of intersection of the two curves represents

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Important Questions on Chemical Kinetics

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 8

For the reaction

A ⟶

products, the graph of the fraction of

A

remaining as a function of time

x -

axis is a straight line with

- ve

slope. The order of the reaction is therefore:

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 9

The rate law for the dimerisation of ${NO}_{2}$ into $N_{2} O_{4}$ is $- \frac{d [{NO}_{2}]}{dt} = k {[{NO}_{2}]}^{2}$
Which of the following changes will change the value of the specific rate constant $k ?$

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 10

The order of a reaction $A \to$ product in which half the reagent is reacted is half an hour, three quarters in one hour and seven - eighth in one and half hours is

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 11

The rate constant of a reaction is

2.5 \times 10^{- 2} {mol}^{- 2} litre {}^{2}\min^{- 1} .

The order of reaction is

MEDIUM

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 12

$S_{1} :$ The frequency factor has the same unit as the rate constant, $K$ .

$S_{2} :$ A plot $ℓn$ rate vs $ℓn C$ for the $nth$ order reaction gives a straight line with stope $- n$ intercept $k_{n}$ in.

$S_{3} :$ The order of a reaction $A \to$ product in which half the reagent is reacted in half an hour, three quarters in one hour and seven - eighth in one and half hours must be $1$ (unity).

$S_{4} :$ The unit of rate constant for a second order reaction will be $M^{- 1} s^{- 1} . (M$ is representing the molarity of solution.)