For a certain reaction the variation of the rate constant with temperature is given by the equation

The value of the temperature coefficient of the reaction rate is therefore –

(A) 4

(B) 3

(C) 2

(D) 10

Concept Questions :-

First Order Reaction Kinetics
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A catalyst lowers the activation energy of a reaction from . The temperature at which the uncatalysed reaction will have the same rate as that of the catalysed at $27°C$ s

(A) $-123°C$

(B) $327°C$

(C) 327°C

(D) $+23°C$

Concept Questions :-

Arrhenius Equation
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The rate of reaction triples when temperature change from . Calculate energy of activation for the reaction.

(A)

(B)

Concept Questions :-

Arrhenius Equation
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The half life time for the decomposition of a substance dissolved in $CC{l}_{4}$ is 2.5 hour at $30°$C. How much of the substance will be left after 10 hours, if the initial weight of the substance is 160 gm ?

(A) 20 gm

(B) 30 gm

(C) 40 gm

(D) 10 gm

Concept Questions :-

First Order Reaction Kinetics
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

For the reaction

If initial concentration of is 0.0.174 M at 273 K. Calculate time at which concentration of

(A) 1990 seconds.

(B) 1090 seconds

(C) 2100 seconds.

(C) 2110 seconds.

Concept Questions :-

First Order Reaction Kinetics
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

What is the activation energy for the decomposition of  If the values of the rate constants are  respectively.

(A)

(B)

(C)

(D)

Concept Questions :-

Arrhenius Equation
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Find out the percentage of the reactant molecules crossing over the energy bariier at 325 K, given that

1. 80.62 %

2. 85.23 %

3. 89.27 &

4. None of the above

Concept Questions :-

First Order Reaction Kinetics
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The rate constant for a first order reaction is $60{s}^{-1}$. How much time will it take to reduce the initial concentration of the reactant to its 1/16th value –

(A) 0.046 s

(B) 0.46 s

(C) 1.124 s

(D) 2.123 s

Concept Questions :-

First Order Reaction Kinetics
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

1 mole of gas changes linearly from initial state (2 atm, 10 lt) to final state (8 atm, 4 lt). Find the value of rate constant, at the maximum temperature, that the gas can attain. Maximum rate constant is equal to 20 $se{c}^{-1}$ and value of activation energy is 40 kJ $mol{e}^{-1}$, assuming that activation energy does not change in this temperature range.

(A)

(B)

(C)

(D)

Concept Questions :-

First Order Reaction Kinetics
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A first order reaction was started with a decimolar solution of the reactant. After 8 minutes and 20 seconds, its concentration was found to be M/100. Determine the rate constant of the reaction.

(A)

(B)

(C)

(D)

Concept Questions :-

First Order Reaction Kinetics