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Important Questions on Chemical Kinetics

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Beta Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>EXERCISE-3>Q 12

The reaction

2 A + B + C \to D + E

is found to the first order in

A

second in

B

and zero order in

C

. How many times rate increases by increasing concentration of

A, B

and

C

two times.

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Beta Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>EXERCISE-3>Q 13

For the elementary reaction

2 A + B_{2} \to 2 AB

. Calculate how much the rate of reaction will change if the volume of the vessel is reduced to one third of its original volume?

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Beta Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>EXERCISE-3>Q 14

A first order reaction

75 %

completed in

27 \min

. How long time will it for

87.5 %

completion.Fill your answer as sum of digits till you get the single digit answer.

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Beta Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>EXERCISE-3>Q 15

A first order reaction has a rate constant

1.5 \times 10^{- 3} \sec^{- 1}

. How long will

5.0 g

of this reactant take to reduce to

1.25 g

.Fill your answer as sum of digits till you get the single digit answer.

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Beta Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>EXERCISE-3>Q 16

A drug is known to be ineffective after it has decomposed $30 %$ . The original concentration of a sample was $500 units / mL$ . when analyzed $20$ months later, the concentration was found to be $420 units / mL$ . Assuming that decomposition is of $I$ order, what will be the expiry time of the drug?

Fill your answer as sum of digits till you get the single digit answer.

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Beta Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>EXERCISE-3>Q 17

At $800 ° C$ the rate of reaction $2 NO + H_{2} \to N_{2} + H_{2} O$ . Changes with the concentration of $NO$ and $H_{2}$ are

	$[NO]$ in $M$	$[H_{2}]$ in $M$	$- \frac{1}{2} \frac{d [NO]}{dt}$ in $\sec^{- 1}$
(i)	$1.5 \times 10^{- 4}$	$4 \times 10^{- 3}$	$4.4 \times 10^{- 4}$
(ii)	$1.5 \times 10^{- 4}$	$2 \times 10^{- 3}$	$2.2 \times 10^{- 4}$
(iii)	$3.0 \times 10^{- 4}$	$2 \times 10^{- 3}$	$8.8 \times 10^{- 4}$

What is the order of this reaction?

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Beta Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>EXERCISE-3>Q 18

The catalytic decomposition of $N_{2} O$ by gold at $900 ° C$ and at an initial pressure of $200 mm$ is $50 %$ complete in $53$ minute and $73 %$ complete in $100$ minutes.

What is the order of the reaction?

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Beta Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>EXERCISE-3>Q 19

The following data are for the reaction $A + B \to$ products:

Conc. $A$ $(M)$	Conc. $B$ $(M)$	Initial Rate $(mol L^{- 1} s^{- 1})$
$0.1$	$0.1$	$4.0 \times 10^{- 4}$
$0.2$	$0.2$	$1.6 \times 10^{- 3}$
$0.5$	$0.1$	$2.0 \times 10^{- 3}$
$0.5$	$0.5$	$1.0 \times 10^{- 2}$

What is the total order for the reaction?

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Important Questions on Chemical Kinetics

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