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CHXII04:CHEMICAL KINETICS

320124 For the reaction $A + B \to$ products, it is observed that:
(A) On doubling the initial concentration of A only, the rate of reaction is also doubled
(B) On doubling the initial concentrations of both $A$ and $B$ , there is a change by a factor of 8 in the rate of the reaction.
The rate law of this reaction is given by

1

r a t e = [A] [B]^{2}

2

r a t e = k [A]^{2} {[B]}^{2}

3

r a t e = k [A] [B]

4

r a t e = k [A]^{2} [B]

Explanation:

$r = k [A]^{m} [B]^{n}$
$\begin{aligned} 2 r = k [2 A]^{m} [B]^{n} \\ 8 r = k [2 A]^{m} [2 B]^{n} \end{aligned}$
By (1) and (2), $m = 1$
By (2) and (3), $n = 2$
$∴ r = k [A]^{1} [B]^{2}$

CHXII04:CHEMICAL KINETICS

320125 Assertion :
The order of a reaction can have fractional value.
Reason :
The order of a reaction cannot be written from balanced equation of a reaction

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Both Assertion and Reason are incorrect.

AIIMS - 2008

CHXII04:CHEMICAL KINETICS

320126 Assertion :
The order of a reaction may be negative.
Reason :
In some cases, the rate of reaction decreases as the concentration of the reactant increases.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

CHXII04:CHEMICAL KINETICS

320127 For the reaction
$B + 2D \to 3T, - \frac{d C_{B}}{dt} = k C_{B} C_{D}^{2}$
The expression for, $\frac{d C_{D}}{d t}$ will be:

1

2k C_{B} C_{D}^{2}

2

\frac{1}{2} k C_{B} {C_{D}}^{2}

3

4k C_{B} C_{D}^{2}

4

\frac{1}{4} k C_{B} C_{D}^{2}

Explanation:

Given,
$- \frac{d C_{B}}{d t} or - \frac{d [B]}{d t} = k C_{B} C_{D}^{2} ork [B] [D]^{2}$
According equation,
$\begin{aligned} - \frac{d C_{B}}{d t} = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ ∴ [- \frac{d C_{D}}{d t}] = 2 k C_{B} C_{D}^{2} \end{aligned}$

CHXII04:CHEMICAL KINETICS

320128 The rate constant of a reaction is $175 li t^{2} mo l^{- 2} se c^{- 1}$ . What is the order of reaction?

1 First

2 Second

3 Third

4 Zero

Explanation:

From units of rate constant, the reaction is third order. ' $k$ ' units $\Rightarrow$ lit $^{n - 1} {mol}^{1 - n} \sec^{-}$

CHXII04:CHEMICAL KINETICS

320124 For the reaction $A + B \to$ products, it is observed that:
(A) On doubling the initial concentration of A only, the rate of reaction is also doubled
(B) On doubling the initial concentrations of both $A$ and $B$ , there is a change by a factor of 8 in the rate of the reaction.
The rate law of this reaction is given by

1

r a t e = [A] [B]^{2}

2

r a t e = k [A]^{2} {[B]}^{2}

3

r a t e = k [A] [B]

4

r a t e = k [A]^{2} [B]

Explanation:

$r = k [A]^{m} [B]^{n}$
$\begin{aligned} 2 r = k [2 A]^{m} [B]^{n} \\ 8 r = k [2 A]^{m} [2 B]^{n} \end{aligned}$
By (1) and (2), $m = 1$
By (2) and (3), $n = 2$
$∴ r = k [A]^{1} [B]^{2}$

CHXII04:CHEMICAL KINETICS

320125 Assertion :
The order of a reaction can have fractional value.
Reason :
The order of a reaction cannot be written from balanced equation of a reaction

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Both Assertion and Reason are incorrect.

AIIMS - 2008

CHXII04:CHEMICAL KINETICS

320126 Assertion :
The order of a reaction may be negative.
Reason :
In some cases, the rate of reaction decreases as the concentration of the reactant increases.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

CHXII04:CHEMICAL KINETICS

320127 For the reaction
$B + 2D \to 3T, - \frac{d C_{B}}{dt} = k C_{B} C_{D}^{2}$
The expression for, $\frac{d C_{D}}{d t}$ will be:

1

2k C_{B} C_{D}^{2}

2

\frac{1}{2} k C_{B} {C_{D}}^{2}

3

4k C_{B} C_{D}^{2}

4

\frac{1}{4} k C_{B} C_{D}^{2}

Explanation:

Given,
$- \frac{d C_{B}}{d t} or - \frac{d [B]}{d t} = k C_{B} C_{D}^{2} ork [B] [D]^{2}$
According equation,
$\begin{aligned} - \frac{d C_{B}}{d t} = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ ∴ [- \frac{d C_{D}}{d t}] = 2 k C_{B} C_{D}^{2} \end{aligned}$

CHXII04:CHEMICAL KINETICS

320128 The rate constant of a reaction is $175 li t^{2} mo l^{- 2} se c^{- 1}$ . What is the order of reaction?

1 First

2 Second

3 Third

4 Zero

Explanation:

From units of rate constant, the reaction is third order. ' $k$ ' units $\Rightarrow$ lit $^{n - 1} {mol}^{1 - n} \sec^{-}$

CHXII04:CHEMICAL KINETICS

320124 For the reaction $A + B \to$ products, it is observed that:
(A) On doubling the initial concentration of A only, the rate of reaction is also doubled
(B) On doubling the initial concentrations of both $A$ and $B$ , there is a change by a factor of 8 in the rate of the reaction.
The rate law of this reaction is given by

1

r a t e = [A] [B]^{2}

2

r a t e = k [A]^{2} {[B]}^{2}

3

r a t e = k [A] [B]

4

r a t e = k [A]^{2} [B]

Explanation:

$r = k [A]^{m} [B]^{n}$
$\begin{aligned} 2 r = k [2 A]^{m} [B]^{n} \\ 8 r = k [2 A]^{m} [2 B]^{n} \end{aligned}$
By (1) and (2), $m = 1$
By (2) and (3), $n = 2$
$∴ r = k [A]^{1} [B]^{2}$

CHXII04:CHEMICAL KINETICS

320125 Assertion :
The order of a reaction can have fractional value.
Reason :
The order of a reaction cannot be written from balanced equation of a reaction

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Both Assertion and Reason are incorrect.

AIIMS - 2008

CHXII04:CHEMICAL KINETICS

320126 Assertion :
The order of a reaction may be negative.
Reason :
In some cases, the rate of reaction decreases as the concentration of the reactant increases.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

CHXII04:CHEMICAL KINETICS

320127 For the reaction
$B + 2D \to 3T, - \frac{d C_{B}}{dt} = k C_{B} C_{D}^{2}$
The expression for, $\frac{d C_{D}}{d t}$ will be:

1

2k C_{B} C_{D}^{2}

2

\frac{1}{2} k C_{B} {C_{D}}^{2}

3

4k C_{B} C_{D}^{2}

4

\frac{1}{4} k C_{B} C_{D}^{2}

Explanation:

Given,
$- \frac{d C_{B}}{d t} or - \frac{d [B]}{d t} = k C_{B} C_{D}^{2} ork [B] [D]^{2}$
According equation,
$\begin{aligned} - \frac{d C_{B}}{d t} = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ ∴ [- \frac{d C_{D}}{d t}] = 2 k C_{B} C_{D}^{2} \end{aligned}$

CHXII04:CHEMICAL KINETICS

320128 The rate constant of a reaction is $175 li t^{2} mo l^{- 2} se c^{- 1}$ . What is the order of reaction?

1 First

2 Second

3 Third

4 Zero

Explanation:

From units of rate constant, the reaction is third order. ' $k$ ' units $\Rightarrow$ lit $^{n - 1} {mol}^{1 - n} \sec^{-}$

CHXII04:CHEMICAL KINETICS

320124 For the reaction $A + B \to$ products, it is observed that:
(A) On doubling the initial concentration of A only, the rate of reaction is also doubled
(B) On doubling the initial concentrations of both $A$ and $B$ , there is a change by a factor of 8 in the rate of the reaction.
The rate law of this reaction is given by

1

r a t e = [A] [B]^{2}

2

r a t e = k [A]^{2} {[B]}^{2}

3

r a t e = k [A] [B]

4

r a t e = k [A]^{2} [B]

Explanation:

$r = k [A]^{m} [B]^{n}$
$\begin{aligned} 2 r = k [2 A]^{m} [B]^{n} \\ 8 r = k [2 A]^{m} [2 B]^{n} \end{aligned}$
By (1) and (2), $m = 1$
By (2) and (3), $n = 2$
$∴ r = k [A]^{1} [B]^{2}$

CHXII04:CHEMICAL KINETICS

320125 Assertion :
The order of a reaction can have fractional value.
Reason :
The order of a reaction cannot be written from balanced equation of a reaction

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Both Assertion and Reason are incorrect.

AIIMS - 2008

CHXII04:CHEMICAL KINETICS

320126 Assertion :
The order of a reaction may be negative.
Reason :
In some cases, the rate of reaction decreases as the concentration of the reactant increases.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

CHXII04:CHEMICAL KINETICS

320127 For the reaction
$B + 2D \to 3T, - \frac{d C_{B}}{dt} = k C_{B} C_{D}^{2}$
The expression for, $\frac{d C_{D}}{d t}$ will be:

1

2k C_{B} C_{D}^{2}

2

\frac{1}{2} k C_{B} {C_{D}}^{2}

3

4k C_{B} C_{D}^{2}

4

\frac{1}{4} k C_{B} C_{D}^{2}

Explanation:

Given,
$- \frac{d C_{B}}{d t} or - \frac{d [B]}{d t} = k C_{B} C_{D}^{2} ork [B] [D]^{2}$
According equation,
$\begin{aligned} - \frac{d C_{B}}{d t} = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ ∴ [- \frac{d C_{D}}{d t}] = 2 k C_{B} C_{D}^{2} \end{aligned}$

CHXII04:CHEMICAL KINETICS

320128 The rate constant of a reaction is $175 li t^{2} mo l^{- 2} se c^{- 1}$ . What is the order of reaction?

1 First

2 Second

3 Third

4 Zero

Explanation:

From units of rate constant, the reaction is third order. ' $k$ ' units $\Rightarrow$ lit $^{n - 1} {mol}^{1 - n} \sec^{-}$

CHXII04:CHEMICAL KINETICS

320124 For the reaction $A + B \to$ products, it is observed that:
(A) On doubling the initial concentration of A only, the rate of reaction is also doubled
(B) On doubling the initial concentrations of both $A$ and $B$ , there is a change by a factor of 8 in the rate of the reaction.
The rate law of this reaction is given by

1

r a t e = [A] [B]^{2}

2

r a t e = k [A]^{2} {[B]}^{2}

3

r a t e = k [A] [B]

4

r a t e = k [A]^{2} [B]

Explanation:

$r = k [A]^{m} [B]^{n}$
$\begin{aligned} 2 r = k [2 A]^{m} [B]^{n} \\ 8 r = k [2 A]^{m} [2 B]^{n} \end{aligned}$
By (1) and (2), $m = 1$
By (2) and (3), $n = 2$
$∴ r = k [A]^{1} [B]^{2}$

CHXII04:CHEMICAL KINETICS

320125 Assertion :
The order of a reaction can have fractional value.
Reason :
The order of a reaction cannot be written from balanced equation of a reaction

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Both Assertion and Reason are incorrect.

AIIMS - 2008

CHXII04:CHEMICAL KINETICS

320126 Assertion :
The order of a reaction may be negative.
Reason :
In some cases, the rate of reaction decreases as the concentration of the reactant increases.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

CHXII04:CHEMICAL KINETICS

320127 For the reaction
$B + 2D \to 3T, - \frac{d C_{B}}{dt} = k C_{B} C_{D}^{2}$
The expression for, $\frac{d C_{D}}{d t}$ will be:

1

2k C_{B} C_{D}^{2}

2

\frac{1}{2} k C_{B} {C_{D}}^{2}

3

4k C_{B} C_{D}^{2}

4

\frac{1}{4} k C_{B} C_{D}^{2}

Explanation:

Given,
$- \frac{d C_{B}}{d t} or - \frac{d [B]}{d t} = k C_{B} C_{D}^{2} ork [B] [D]^{2}$
According equation,
$\begin{aligned} - \frac{d C_{B}}{d t} = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ = \frac{1}{2} [- \frac{d C_{D}}{d t}] = k C_{B} C_{D}^{2} \\ ∴ [- \frac{d C_{D}}{d t}] = 2 k C_{B} C_{D}^{2} \end{aligned}$

CHXII04:CHEMICAL KINETICS

320128 The rate constant of a reaction is $175 li t^{2} mo l^{- 2} se c^{- 1}$ . What is the order of reaction?

1 First

2 Second

3 Third

4 Zero

Explanation:

From units of rate constant, the reaction is third order. ' $k$ ' units $\Rightarrow$ lit $^{n - 1} {mol}^{1 - n} \sec^{-}$