Pradeep's Chemistry Vol 1>Chapter 8 - Equilibrium in Physical and Chemical Processes>Competition Focus>Q 6

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White solid balls of naphthalene $(C_{10} H_{8})$ used as moth balls were kept in a closed container at room temperature $(27 ° C)$ . The vapour pressure above the balls was found to be $0.10 mm Hg$ . The value of $K_{c}$ for the sublimation equilibrium, $C_{10} H_{8} (s) ⇌ C_{10} H_{8} (v)$ is

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Important Questions on Equilibrium in Physical and Chemical Processes

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 8 - Equilibrium in Physical and Chemical Processes>Competition Focus>Q 7

For the reaction,

{SO}_{2} (g) + \frac{1}{2} O_{2} (g) ⇌ {SO}_{3} (g)

; if

K_{p} = K_{c} (RT)^{x}

where the symbols have usual meaning, then value of

x

is (assuming ideality)

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Pradeep's Chemistry Vol 1>Chapter 8 - Equilibrium in Physical and Chemical Processes>Competition Focus>Q 8

For the reaction

CO (g) + {Cl}_{2} (g) ⇌ {COCl}_{2} (g)

,

K_{p} / K_{c}

is equal to

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 8 - Equilibrium in Physical and Chemical Processes>Competition Focus>Q 9

The equilibrium constant value

K_{p}

for the equilibrium

H_{2} (g) + I_{2} (g) ⇌ 2 HI (g)

changes with

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Pradeep's Chemistry Vol 1>Chapter 8 - Equilibrium in Physical and Chemical Processes>Competition Focus>Q 10

Given:

2 N_{2} O (g) ⇌ 2 N_{2} (g) + O_{2} (g), K = 3.5 \times 10^{33}

2 {NO}_{2} (g) ⇌ N_{2} (g) + 2 O_{2} (g), K = 6.7 \times 10^{16}

2 NO (g) ⇌ N_{2} (g) + O_{2} (g), K = 2.2 \times 10^{30}

2 N_{2} O_{5} (g) ⇌ 2 N_{2} (g) + 5 O_{2} (g), K = 1.2 \times 10^{34}

Which oxide of nitrogen is most stable?

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Pradeep's Chemistry Vol 1>Chapter 8 - Equilibrium in Physical and Chemical Processes>Competition Focus>Q 11

The equilibrium constant

(K_{c})

for the reaction

N_{2} (g) + O_{2} (g) ⇌ 2 NO (g)

at temperature

T

is

4 \times 10^{- 4}

. The value of

K_{c}

for the reaction

NO (g) ⇌ 1 / 2 N_{2} (g) + 1 / 2 O_{2} (g)

at the same temperature is

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Pradeep's Chemistry Vol 1>Chapter 8 - Equilibrium in Physical and Chemical Processes>Competition Focus>Q 13

Consider the following gaseous equilibrium with equilibrium constants

K_{1}

and

K_{2}

respectively

{SO}_{2} (g) + \frac{1}{2} O_{2} (g) ⇌ {SO}_{3} (g) 2 {SO}_{3} (g) ⇌ 2 {SO}_{2} (g) + O_{2} (g)

The equilibrium constants are related as

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Pradeep's Chemistry Vol 1>Chapter 8 - Equilibrium in Physical and Chemical Processes>Competition Focus>Q 14

The equilibrium constants of the following are

N_{2} + 3 H_{2} ⇌ 2 {NH}_{3} K_{1} N_{2} + O_{2} ⇌ 2 NO K_{2} H_{2} + \frac{1}{2} O_{2} ⇌ H_{2} O K_{3}

The equilibrium constant

(K)

of the reaction

2 {NH}_{3} + \frac{5}{2} O_{2} ⇌ 2 NO + 3 H_{2} O

will be

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11th CBSE

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Pradeep's Chemistry Vol 1>Chapter 8 - Equilibrium in Physical and Chemical Processes>Competition Focus>Q 15

For the chemical equilibrium,

{CaCO}_{3} (s) ⇌ CaO (s) + {CO}_{2} (g)

,

∆_{r} H °

can be determined from which of the following plots?