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For the following parallel chain reaction , if the sum of the concentration of $B$ and $C$ at any time is $2 M$ . What will be $[B]_{t}$ and ${[C]}_{t}$ respectively?

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Important Questions on Chemical Kinetics

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-1>Q 70

The rate constant, the activiation energy and the Arrhenius parameter of a chemical reaction at

25 ° C

are

3.0 \times 10^{- 4} s^{- 1}

104.4 kJ {mol}^{- 1}

and

6.0 \times 10^{14} s^{- 1}

, respectively. The value of the rate constant at

T \to \infty

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-1>Q 71

The rate constant

K_{1}

of a reaction is found to be double that of the rate constant

K_{2}

of another reaction. The relationship between corresponding activation energies of the two reactions at the same temperature

(E_{1} and E_{2})

can be represented as:

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-1>Q 73

How much faster would a reaction proceed at

25 ° C

than at

0 ° C

, if the activation energy is

65 kJ

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-1>Q 75

The

E_{a}

of reaction in the presence of catalyst is

4.15 KJ / mol

and in the absence of catalyst is

8.3 KJ

m o l^{- 1}

. What is the slope of the plot of

\ln k v s

\frac{1}{T}

in the absence of catalyst.

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-1>Q 77

For the reaction,

H_{2} (g) + {Br}_{2} (g) \to 2 HBr (g)

, the experiment data suggested that

r = k [H_{2}] {[{Br}_{2}]}^{1 / 2}

. The molecularity and order of the reaction are, respectively:

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-1>Q 78

The reaction of ${NO}_{2} (g)$ and $O_{3} (g)$ is first order in ${NO}_{2} (g)$ and $O_{3} (g)$

$2 {NO}_{2} (g) + O_{3} (g) ⟶ N_{2} O_{5} (g) + O_{2} (g)$

The reaction can take place by mechanism:

$I : {NO}_{2} + O_{3} \overset{sbw}{⟶} {NO}_{3} + O_{2}$

${NO}_{3} + {NO}_{2} \overset{fast}{⟶} N_{2} O_{5}$

$II : O_{3} ⇌_{K_{b}}^{k_{a} fast} O_{2} + [O]$

${NO}_{2} + O \overset{slow}{⟶} {NO}_{3}$

${NO}_{3} + {NO}_{2} \overset{fast}{⟶} N_{2} O_{5}$

Select correct mechanism.

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-1>Q 80

The reaction of hydrogen and iodine monochloride is represented by the equation:

$H_{2} (g) + 2 ICl (g) ⟶ 2 HCl (g) + I_{2} (g)$

This reaction is first-order in $H_{2} (g)$ and also first-order in $ICl (g)$ . Which of these proposed mechanisms can be consistent with the given information about this reaction?

Mechanism $I$ : $H_{2} (g) + 2 ICl (g) ⟶ 2 HCl (g) + I_{2} (g)$

Mechanism $II$ : $H_{2} (g) + ICl (g) \overset{Slow}{⟶} HCl (g) + HI (g)$

$Hl (g) + ICl (g) \overset{fast}{⟶} HCl (g) + I_{2} (g)$

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-1>Q 82

A radioactive element has a half-life of one day. After three days the amount of the element left will be:

For the following parallel chain reaction , if the sum of the concentration of B and C at any time is 2M. What will be [B]t and [C]t respectively?

Important Questions on Chemical Kinetics

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For the following parallel chain reaction , if the sum of the concentration of $B$ and $C$ at any time is $2 M$ . What will be $[B]_{t}$ and ${[C]}_{t}$ respectively?