MCQs of Chemical Kinetics

Chemical Kinetics MCQs

MCQs of Chemical Kinetics

Showing 31 to 40 out of 228 Questions

31.

For the reaction n₁A + n₂B → Products: Rate = K [A]³[B]⁰ if concentration of A is doubled and concentration of B is halved, then reaction rate _____ .

(a)	increases by four times
(b)	increases by eight times
(c)	is doubled
(d)	becomes ten times

32.

Which of the following is indicated by the stoichiometry of the reaction ?

(a)	Order of reaction.
(b)	Mechanism of reaction.
(c)	The number of intermediate compound.
(d)	The relative mole number of reactants and products.

33.

What is the Si unit of reaction rate ?

(a)	mole sec^-1
(b)	mole m^-3 sec^-1
(c)	mole dm sec^-1
(d)	mole lit^-1

34.

If the reaction between half reaction time and [R]₀, is

t_{\frac{1}{2}} \propto \frac{1}{{[R]_{0}}^{n - 1}}

, then what will be the order of reaction ?

(a)	$\frac{n - 2}{2}$
(b)	n - 1
(c)	$\frac{1}{n - 2}$
(d)	n

35.

What is indicated by

- \frac{1}{2} \frac{d [N_{2} O_{5}]}{d t}

(a)	Rate of introduction of $N_{2} O_{5}$
(b)	Decomposition rate of $N_{2} O_{5}$
(c)	Order of reaction
(d)	Molecularity of reaction

36.

What is indicated by negative sing before the term of reaction rate ?

(a)	The kinetic energy of the reaction decreases with time.
(b)	The energy barrier of reaction decreases with time.
(c)	The energy of activation of reaction decreases with time.
(d)	The concentration of reactants decreases with time.

37.

If temperature of the reaction is increased from 300 to 310 K, the value of rate constant is almost doubled because _____ .

(a)	kinetic energy is doubled
(b)	the fraction effective collision of molecules is almost doubled
(c)	the number of molecular collision increases
(d)	energy of activation decreases

38.

For a first order reaction K =

10^{- 3} \min^{- 1} t_{\frac{1}{2}}

= _____ .

(a)	3300 min
(b)	2000 min
(c)	1500 min
(d)	None of the three

39.

Zero order reaction means _____ .

(a)	reaction occurring at zero Kelvin temperature
(b)	the value of reaction rate is zero
(c)	the reaction in which the reactants do not take part in chemical reaction
(d)	reaction rate and rate constant are equal

40.

Elementary reaction 2SO_2(g) + O_2(g) → Products. If pressure is increased by three times, then reaction rate _____ .

(a)	increases by 3 times
(b)	increases by 9 times
(c)	increase by 18 times
(d)	increases by 27 times

Showing 31 to 40 out of 228 Questions