Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 51

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The reaction $N_{2} O_{5}$ (in ${CCl}_{4}) \to 2 {NO}_{2} + 1 / 2 O_{2 (g)}$ is first order in $N_{2} O_{5}$ with rate constant $6.2 \times 10^{- 4} \sec^{- 1}$ what is the value of rate of reaction when $[N_{2} O_{5}] = 1.25 mol l^{- 1}$

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Important Questions on Chemical Kinetics

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 52

k

for a zero order reaction is

2 \times 10^{- 2} mol L^{- 1} s^{- 1}

. If the concentration of the reactant after

25 s

is

0.5 M,

the initial concentration must have been

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 53

Plot of

\log (a - x)

vs time

t

is straight line. This indicates that the reaction is of:

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 54

In a certain reaction,

10 %

of the reactant decomposes in one hour,

20 %

in two hours,

30 %

in three hours, and so on. The dimension of the rate constant is:

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 55

If a first order reaction is completed to the extent of

75 %

and

50 %

in time intervals,

t_{1}

and

t_{2}

, what is the ratio,

t_{1} : t_{2}

?

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 56

The rate constant for a reaction is

\frac{\ln 2}{10} \min^{- 1}

. What will be the order of reaction and time taken to change concentration from

1 m

to

0.25 M

.

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 57

In the case of zero order reaction, the ratio of time required for 75% completion to 50% completion is

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 58

For the irreversible process,

A + B ⟶

products, the rate is first-order with respect to

A

and second-order with respect to

B

. If

1.0 mol

each of

A

and

B

are introduced to

1.0 L

vessel and the initial rate was

1.0 \times 10^{- 2} mol 1.0 \times 10^{- 2} mol L^{- 1} L^{- 1} S^{- 1}

. Rate when half reactants have been turned into products is:

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Alpha Question Bank for Medical: Chemistry>Chapter 10 - Chemical Kinetics>Exercise 1>Q 59

The rate constant of the reaction

A \to 2 B

is

1.0 \times 10^{- 3} mol {lit}^{-1} \min^{- 1}

, if the initial concentration of

A

is

1.0 mol {lit}^{- 1}

what would be the concentration of

B

after

100

minutes.