For the reaction, 2 A + B → products, when the concentration of A and B both were doubled, the rate of the reaction increased from 0.3 m o l L - 1 s - 1 to 2.4 m o l L - 1 s - 1 . When the concentration of A alone is doubled, the rate increased from 0.3 m o l L - 1 s - 1 to 0.6 m o l L - 1 s - 1 . Which one of the following statements is correct?

Order of the reaction with respect to B is 2

Total order of the reaction is 4

Order of the reaction with respect to A is 2

Order of the reaction with respect to B is 1

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In the reaction between iodide ion and hydrogen peroxide, what is the role of iodide ion?

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Important Questions on Physical Chemistry Experiments

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The number of octahedral voids per lattice site in a lattice is_. (Rounded off to the nearest integer)

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A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is doubled?

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On which of the following parameters does the rate constant of a reaction depend?
(i) time, (ii) concentration of reactants, (iii) temperature, and (iv) catalyst

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The rate of a first-order reaction is

0.04 m o l l^{- 1} s^{- 1}

10

second and

0.03 m o l l^{- 1} s^{- 1}

20

seconds after initiation of the reaction. The half-life period of the reaction is:

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The rate of a gaseous reaction is given by the expression

k [A] [B]^{2} .

If the volume of vessel is reduced to one half of the initial volume, the reaction rate as compared to original rate is

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The addition of a catalyst during a chemical reaction alters which of the following quantities?

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Name the factors that affect the rate of a reaction. Explain in detail.

HARD

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For an elementary chemical reaction, $A_{2} ⇄_{k_{- 1}}^{k_{1}} 2 A$ , the expression for $\frac{d [A]}{dt}$ is:

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How will the rate of reaction be affected when surface area of the reactant is reduced?

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In mechanism of any reaction, the step going in the slowest manner is called _____

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Consider the given plots for a reaction obeying Arrhenius equation $(0 ° C < T < 300 ° C) :$ ( $K$ and $E_{a}$ are rate constant and activation energy, respectively )

(I)

Question Image

(II)

Question Image

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1 L

2 M {CH}_{3} COOH

is mixed with

1 L

3 M C_{2} H_{5} OH

to form an ester. The rate of the reaction with respect to the initial rate when each solution is diluted with an equal volume of water will be

EASY

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Decomposition of

X

exhibits a rate constant of

0 .05 μg / year

. How many years are required for the decomposition of

5 μg

X

into

2 .5 μg

HARD

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According to the Arrhenius equation,

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For the reaction,

2 A + B \to

products, when the concentration of

A

and

B

both were doubled, the rate of the reaction increased from

0.3 m o l L^{- 1} s^{- 1}

2.4 m o l L^{- 1} s^{- 1} .

When the concentration of

A

alone is doubled, the rate increased from

0.3 m o l L^{- 1} s^{- 1}

0.6 m o l L^{- 1} s^{- 1} .

Which one of the following statements is correct?

HARD

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For a first order reaction

A (g) \to 2 B (g) + C (g)

at constant volume and 300 K, the total pressure at the beginning

(t = 0)

and at time are

p_{0} and p_{t}

, respectively. Initially, only A is present with concentration

{[A]}_{0}

, and

t_{\frac{1}{3}}

is the time required for the partial pressure of A to reach

1 / 3^{rd}

of its initial value. The correct option(s) is (are)
(Assume that all these gases behave as ideal gases)

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For a reaction, consider the plot of $l n k$ versus $1 / T$ given in the figure. If the rate constant of this reaction at $400 K$ is $10^{- 5} s^{- 1}$ , then the rate constant at $500 K$ is:

Question Image

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Zinc piece and zinc powder are taken in two test tubes and equal amount of dil.

HCl

is added.
(a) In which test tube does the reaction proceed faster?
(b) Give reason.
(c) Give an instance in daily life, where such condition is made use.

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Which one of the factors does not affect rate of the reaction?

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The decomposition of phosphine

(P H_{3})

on tungsten at low pressure is a first-order reaction. It is because the

In the reaction between iodide ion and hydrogen peroxide, what is the role of iodide ion?

Important Questions on Physical Chemistry Experiments

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