What is the order of a chemical reaction whose rate is deter-mined by the variation of one concentration term only?

A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)

A

$$ \propto {\text{CA}}$$

B

$$ \propto \frac{1}{{{\text{CA}}}}$$

C

Independent of temperature

D

None of these

Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.

A

Proportional to

B

Independent of

C

Inversely proportional to

D

Proportional to the square of

At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

A

Independent of

B

Directly proportional to

C

Inversely proportional to

D

Proportional to the square of

Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.

A

Zero order

B

Third order

C

Consecutive

D

None of these

If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.

A

$${\text{t}} \propto \frac{1}{{{{\text{a}}^{\text{n}}}}}$$

B

$${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} - 1}}}}$$

C

$${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} + 1}}}}$$

D

$${\text{t}} \propto {{\text{a}}^{\text{n}}}$$

What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction?

A

0

B

1

C

2

D

3

If the time required for half change is inversely proportional to the square of initial concentration and the velocity depends on the units in which the concentration term is expressed, then the order of reaction is

A

1

B

2

C

3

D

0

The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.

A

More than

B

Less than

C

Equal to

D

Either B or C

If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is

A

Zero

B

One

C

Two

D

Three

The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are

A

Always irreversible

B

Insensitive to temperature changes

C

Mostly irreversible

D

Highly temperature sensitive

What is the order of a chemical reaction whose rate is deter-mined by the variation of one concentration term only?

Related Questions