Chemical Reaction MCQs

A. More
B. Less
C. Same
D. Either a. or b., depends on other factors

A. Time for half change is half the time taken for completion of the reaction
B. Time for half change is independent of the initial concentration
C. Time for completion of the reaction is independent of the initial concentration
D. Reaction rate is trebled when the initial concentration is trebled

A. Pressure and temperature only
B. Temperature and composition only
C. Pressure and composition only
D. Pressure, temperature and composition

A. Film
B. Ash layer
C. Pore
D. None of these

A. Ca0/2k
B. Ca0/k
C. 0.693/k
D. 1/k

A. A highly exothermic reaction is to be controlled
B. Undesirable side reaction (at high concentration of one of the reactants) is to be avoided
C. A gas is to be reacted with liquid (e.g. hydrogenation of fat)
D. All a., b., and c.

A. More
B. Less
C. Same
D. Either a. or b., depends on order of reaction

A. Solid density
B. Pore volume
C. Surface area
D. All a., b. and c.

A. Water will evaporate
B. Equilibrium will not be attained
C. More ice will be formed
D. More water will be formed

A. Catalyst
B. Temperature
C. Reactant’s concentration
D. Number of molecules of reactants taking part in the reaction