TN State Board Samacheer Kalvi Online Test for 11th Std - Chemistry - English - Chemical Kinetics

Question 1 Of 10

The decomposition of phosphine (PH3) on tungsten at low pressure is a first order reaction. It is because the …………….

rate is proportional to the surface coverage rate is inversely proportional to the surface coverage rate is independent of the surface coverage rate of decomposition is slow

Question 2 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 3 Of 10

0.125 M 0.215 M 0.25 × 2.303 M 0.05 M

Question 4 Of 10

During the decomposition of H2O2 to give dioxygen, 48g O2 is formed per minute at a certain point in time. The rate of formation of water at this point is …………….

0.75 mol min-1 1.5 mol min-1 2.25 mol min-1 3.0 mol min-1

Question 5 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 6 Of 10

In a first-order reaction x → y; if k is the rate constant and the initial concentration of the reactant x is 0.1 M, then, the half-life is ……..

((frac { log2 }{ k })) ((frac { 0.693 }{ (0.1)k })) ((frac { In2 }{ k })) none of these

Question 7 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 8 Of 10

For a first order react ion A → product with initial concentration x mol L-1, has a half life period of 2.5 hours. For the same reaction with initial concentration mol L-1 the half life is

(2.5 × 2) hours ((frac { 2.5 }{ 2 })) hours 2.5 hours Without knowing the rate constant, t1/2 cannot be determined from the given data

Question 9 Of 10

The correct difference between first and second-order reactions is that …………

A first-order reaction can be catalysed a second-order reaction cannot be catalysed. The half-life of a first-order reaction does not depend on [A0] the half-life of a second-order reaction does depend on [A0]. The rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations. The rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations,

Question 10 Of 10

Consider the following statements: (i) increase in the concentration of the reactant increases the rate of a zero-order reaction. (ii) rate constant k is equal to collision frequency A if Ea = ∞ (iii) rate constant k is equal to collision frequency A if Ea = o (iv) a plot of ln (k) vs T is a straight line. (v) a plot of ln (k) vs (1/T) is a straight line with a positive slope.

(ii) only (ii) and (iv) (ii) and (v) (i), (ii) and (v)

Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 11th Standard Chemistry - English Medium - Chemical Kinetics

Samacheer Kalvi 11th Chemistry - Chemical Kinetics - Book Back Questions in English Medium