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41) Ionic reactions are:
a) Very slow
b) Fast
c) Slow
d) Very fast
ANSWER : Fast
42) The catalyst used for heterogeneous catalysis is:
a) Solid
b) Gas
c) Liquid
d) None of these
ANSWER : Solid
43) What is the time in sec required for a reaction to be 60% complete, if
the rate constant for a first order reaction is:
a) 68
b) 6.9 x 10-3
c) 1200
d) 3.8 x 10-3
ANSWER : 1200
44) What is the rate of hydrogenation of a reaction if the pressure of
hydrogen gas falls from 3 atm to 2.6 atm in 40 minutes?
a) 0.01 atm min-1
b) 0.04 atm min-1
c) 0.001 atm min-1
d) 0.02 atm min-1
ANSWER : 0.01 atm min-1
45) The relation between the initial concentration, the order of the
reaction and the half life period is:
a) T a an
b) T a 1/an-1
c) T a an-1
d) T a 1/an
ANSWER : T a 1/an-1
46) The catalyst used in pseudo first order hydrolysis of ester is:
a) Salt
b) Water
c) Acid [H+]
d) None of these.
ANSWER : Acid [H+]
47) The ratio of the rate of formation of NH3 and the rate of
disappearance of H2 in the following reaction is N2 + 3H2
?2NH3
a) 2:1
b) 3:2
c) 1:2
d) 2:3
ANSWER : 2:3
48) …………….. is used for studying the rate of a reaction.
a) Chemical equilibria
b) Chemical mechanism
c) Chemical thermodynamics
d) Chemical kinetics.
ANSWER : Chemical kinetics.
49) A first order reaction is 25% incomplete after 16 min. When was 50% of
the reaction completed?
a) 32 minutes.
b) 8 minutes.
c) 4 minutes.
d) 16 minutes.
ANSWER : 8 minutes.
50) The rate constant for the following first order reaction 2N2O5
? 4NO2 + O2, is 3.0 x 10-5 s-1.
Find the concentration of N2O5 in mole L-1 if
the rate is 2.40 x 10-5 mole L-1 s-1.
a) 1.2
b) 1.4
c) 0.8
d) 0.04
ANSWER : 0.04
Part 1
Part 2 Part 3 Part 4
Part 5
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