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?

Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

A

0

B

1

C

2

D

3

For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of 'P' is doubled. If the reaction rate is proportional to C_pⁿ, then what is the value of 'n' for this chemical reaction

A

1

B

2

C

3

D

0

The half life period of nth order reaction varies inversely to ____________ th power of the initial concentration of the reactants.

A

n

B

2n

C

(n+1)

D

(n-1)

If a reaction is nth order the half-life period ________ of the initial concentration of the reactants.

A

is independent

B

varies inversely as (n-1)th power

C

varies inversely as nth power

D

varies directly as (n-1)th power

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will

A

Remain the same

B

Be halved

C

Also be doubled

D

Become one fourth

Which of the following statements are true?
1. All radioactive elements decay exponentially with time.
2. Half-life time of radioactive elements is the time required for one-half of the radioactive atoms to disintegrate.
3. Age of the earth can be determined by radioactive dating.
4. Half-life time of a radioactive element is fifty percent of its average life period.
Select the correct answer:

A

1 and 3

B

1, 3 and 4

C

1, 2 and 3

D

2 and 3

For the chemical reaction X → Y, it is observed that, on doubling the concentration of 'X', the reaction rate quadruples. If the reaction rate is proportional to C_xⁿ, then what is the value of 'n'?

A

4

B

$$\frac{1}{4}$$

C

16

D

2

The rate law for a reaction between the substances A and B is given by rate = Kn m. On doubling the concentration of A and halving the concentration of B. What will be the ratio of the new rate of the earlier rate of the reaction?

A

n m. On doubling the concentration of A and halving the concentration of B. What will be the ratio of the new rate of the earlier rate of the reaction? ] ($\frac{1}{2}$)m+n

B

A

C

A

D

A

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

The rate of the chemical reaction A → B doubles as the concentration of A i.e., C_A is doubled. If rate of reaction is proportional to C_Aⁿ, then what is the value of n for this reaction?

A

0.5

B

1

C

0

D

2

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?

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