TN State Board Samacheer Kalvi Online Test for 12th Std - Chemistry - English - Chemical Kinetics

Question 1 Of 10

After 2 hours, a radioactive substance becomes ((frac { 1 }{ 16 }))th of original amount. Then the half life (in mm) is ………………

60 minutes 120 minutes 30 minutes 15 minutes

Question 2 Of 10

For the reaction, 2NH3 → N2 + 3H2, if

k1 = k2 = k3 k1 = 3k2 = 2k3 1.5k1 = 3k2 = k3 2k1 = k2 = 3k3

Question 3 Of 10

Assertion: rate of reaction doubles when the concentration of the reactant is doubled if it is a first-order reaction.

Both assertion and reason are true and reason is the correct explanation of assertion. Both assertion and reason are true but reason is not the correct explanation of assertion. Assertion is true but reason is false. Both assertion and reason are false.

Question 4 Of 10

In a reversible reaction, the enthalpy change and the activation energy in the forward direction are respectively – x kJ mol-1 and y kJ mol-1. Therefore, the energy of activation in the backward direction is ………..

(v – x) kJ mol-1 (x + y) J mol-1 (x – y) kJ mol-1 (x + y) × 103 J mol-1

Question 5 Of 10

For a first order reaction A → B the rate constant is x min-1. If the initial concentration of A is 0.01 M, the concentration of A after one hour is given by the expression.

0.01 e-x 1 × 10-2 (1 – e-60x) (1 × 10-2) e-60x none of these

Question 6 Of 10

In a homogeneous reaction A → B + C + D, the initial pressure was P0 and after time t it was P. Expression for rate constant in terms of P0, P and t will be

Question 7 Of 10

For the reaction N2 O5(g) → 2NO2(g) +(frac { 1 }{ 2 }) O2(g) the value of rate of disappearance of N2O5 is given as 6.5 × 10-2 mol L-1s-1 The rate of formation of NO2 and O2 is given respectively as

(3.25 × 10-2 mol L-1s-1) and (1.3 × 10-2 mol L-1s-1) (1.3 × 10-2 mol L-1s-1) and (3.25 × 102 mol L-1s-1) (1.3 × 10-1 mol L-1s-1) and (3.25 × 10-2 mol L-1s-1) None of these

Question 8 Of 10

Predict the rate law of the following reaction based on the data given below:

rate = k [A]2 [B] rate = k [A][B]2 rate = k [A][B] rate = k [A]1/2 [B]3/2

Question 9 Of 10

Among the following graphs showing variation of rate constant with temperature (T) for a reaction, the one that exhibits Arrhenius behavior over the entire temperature range is ……………

Question 10 Of 10

0.125 M 0.215 M 0.25 × 2.303 M 0.05 M

Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 12th Standard Chemistry - English Medium - Chemical Kinetics

Samacheer Kalvi 12th Chemistry - Chemical Kinetics - Book Back Questions in English Medium