AIPMT 2009 | Chemical Kinetics Question 43 | Chemistry

AIPMT 2009

MCQ (Single Correct Answer)

-1

For the reaction, N₂ + 3H₂ $$ \to $$ 2NH₃, if
$${{d\left[ {N{H_3}} \right]} \over {dt}}$$ = 2 $$ \times $$ 10^$$-$$4 mol L^$$-$$1 s^$$-$$1,
the value of $${{ - d\left[ {{H_2}} \right]} \over {dt}}$$ would be

4 $$ \times $$ 10^$$-$$4 mol L^$$-$$1 s^$$-$$1

6 $$ \times $$ 10^$$-$$4 mol L^$$-$$1 s^$$-$$1

1 $$ \times $$ 10^$$-$$4 mol L^$$-$$1 s^$$-$$1

3 $$ \times $$ 10^$$-$$4 mol L^$$-$$1 s^$$-$$1

AIPMT 2009

MCQ (Single Correct Answer)

-1

In the reaction,
BrO$$_{3(aq)}^ - $$ + 5Br$$_{(aq)}^ - $$ + 6H⁺ $$ \to $$ 3Br_2(l) + 3H₂O_(l).
The rate of appearance of bromine (Br₂) is related to rate of disappearance of bromide ions as

$${{d\left[ {B{r_2}} \right]} \over {dt}} = - {5 \over 3}{{d\left[ {B{r^ - }} \right]} \over {dt}}$$

$${{d\left[ {B{r_2}} \right]} \over {dt}} = {5 \over 3}{{d\left[ {B{r^ - }} \right]} \over {dt}}$$

$${{d\left[ {B{r_2}} \right]} \over {dt}} = {3 \over 5}{{d\left[ {B{r^ - }} \right]} \over {dt}}$$

$${{d\left[ {B{r_2}} \right]} \over {dt}} = - {3 \over 5}{{d\left[ {B{r^ - }} \right]} \over {dt}}$$

AIPMT 2009

MCQ (Single Correct Answer)

-1

For the reaction A + B $$ \to $$ products, it is observed that

(i) on doubling the initial concentration of A only, the rate of reaction is also doubled and
(ii) on doubling the initial concentration of both A and B, there is a change by a factor of 8 in the rate of the reaction.

The rate of this reaction is given by

rate = k[A]² [B]²

rate = k[A] [B]²

rate = k[A] [B]

rate = k[A]² [B]

AIPMT 2009

MCQ (Single Correct Answer)

-1

Half-life period of a first order reaction is 1386 seconds. The specific rate constant of the reaction is

0.5 $$ \times $$ 10^$$-$$2 s^$$-$$1

0.5 $$ \times $$ 10^$$-$$3 s^$$-$$1

5.0 $$ \times $$ 10^$$-$$2 s^$$-$$1

5.0 $$ \times $$ 10^$$-$$3 s^$$-$$1.

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