Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-2>Q 36

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Which of the following statement(s) about the Arrhenius equation is/are correct?

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Important Questions on Chemical Kinetics

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-2>Q 37

Rate constant

k

varies with temperature by equation,

\log k (\min^{- 1}) = 5 - \frac{2000}{T (K)}

. We can conclude:

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-2>Q 38

Select the correct statements:

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-2>Q 39

Which of the following statements are true regarding the $\log K vs 1 / T$ plot shown in the given diagram?

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-2>Q 40

If the rate of reaction $2 {SO}_{2} (g) + O_{2} (g) \overset{Pi}{⟶} 2 {SO}_{3} (g)$ is given by: Rate $= K \frac{[{SO}_{2}]}{{[{SO}_{3}]}^{1 / 2}}$

Which statements are correct?

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-2>Q 45

Hydrolysis of ester in catalysed by acid. Rate of hydrolysis of ester were obtained initially and after some ester has been hydrolysed as

R_{0}

and

R_{t}

then (same temp.)

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-3>Q 1

The rate constant for the reaction

2 N_{2} O_{5} ⟶ 4 {NO}_{2} + O_{2},

is

3 \times 10^{- 5} s^{- 1} .

If the rate is

2.4 \times 10^{- 5}

{molL}^{- 1} s^{- 1},

then the concentration of

N_{2} O_{5}

(in

{molL}^{- 1}

) is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-3>Q 2

{}_{92}^{238}U

is radioactive and it emits

α

and

β

particles to form

{}_{82}^{206}{Pb}

. Calculate the number of

α

and

β

particles emitted in this conversion. An ore of

{}_{92}^{238}U

is found to contain

{}_{92}^{238}U

and

{}_{82}^{206}{pb}

in the weight ratio of

1 : 0.1 .

The half-life period

{}_{92}^{238}U

is

4.5 \times 10^{9}

years. Calculate the age of the ore.

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Alpha Question Bank for Engineering: Chemistry>Chapter 10 - Chemical Kinetics>Exercise-3>Q 3

A hydrogenation reaction is carried out at

500 K

. If the same reaction is carried out in presence of a catalyst at the same rate, the temperature required is

400 K

. Calculate the activation energy of the reaction, if the catalyst lowers the activation energy barrier by

20 kJ {mol}^{- 1}