Reaction Kinetics MCQ's

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Reaction kinetics chapter 11 chemistry MCQ's for the preparation of entry test for UET, UHS, NUST, PIEAS, GIKI, FAST, AIR, other engineering universities and Medical colleges. These are also very helpful for annual examination for FSc.

1. The unit of rate of reaction is

A) mole dm-3
B) mole Kg-1
C) mole dm-3 sec-1
D) gram dm-3

2. Generally the rate of a reaction is expressed as dx/dt where dx is

A) Small change in concentration of product
B) Small time interval
C) Co-efficient of the reactant
D) Co-efficient of product

3. In the rate equation when the concentration of reactants are unity, then rate is equal to

A) Instantaneous rate
B) Average rate
C) Active mass of procducts
D) Specific rate constant

4. Sum of exponents of the concentration terms in the rate equation is called

A) Rate of reaction
B) Order of reaction
C) Specific rate constant
D) Active mass of reactants

5. The average rate and instantaneous rate of a reaction are equal

A) In the beginning
B) At the end
C) When the time interval of two rates is zero
D) When molar concentration of reactants are unity

6. The order of the reaction 2N2O5 (g) 2N2O4 (g) + O2 is

A) Zero
B) 1
C) 2
D) 1.5

7. When the rate of reaction is entirely independent of the concentration of reactant molecules then order of reaction is

A) Zero
B) Negative
C) In fractions
D) Pseudo first order

8. If initial concentration of the reactants and half life period of the reaction is known, then we can determine

A) Average rate of reaction
B) Order of reaction
C) Rate constant k
D) Instantaneous rate

9. In the hydrolysis reaction CH3COOC2H5 + H2O CH3COOH + C2H5OH The order of reaction is first order because

A) Rate is independent of concentration of water since it is in excess
B) Rate is independent of concentration of ester since it is in excess
C) Rate depends upon the concentration of acid catalyst added
D) (d) Rate = k[CH3COOC2H5]1/2 [H2O]1/2

10. The catalytic activity of enzymes is greatly enhanced by

A) Temperature
B) Increasing PH
C) Light
D) Presence of co-enzyme or activator