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IMPORTANT

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The ${pK}_{a}$ of acetyl salicylic acid (aspirin) is 3.5. The pH of gastric juice in human stomach is about 2-3 and pH in the small intestine is about 8. Aspirin will be:

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Important Questions on Equilibrium

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JEE Main/Advance

IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>EXERCISE-3>Q 14

The value of

K_{c}

for the reaction

3 O_{2} (g) ⇌ 2 O_{3} (g)

1.7 \times 10^{- 56}

25 ° C

. Do you expect pure air at

25 ° C

to contain much

O_{3}

(ozone) when

O_{2}

and

O_{3}

are in equilibrium ? If the equilibrium concentration of

O_{2}

in air at

25 ° C

8 \times 10^{- 3} M

, If equilibrium concentration of

O_{3}

y \times 10^{- 32} mol L^{- 1}

then the calculate the vlaue of '

y

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Beta Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>EXERCISE-3>Q 15

An equilibrium mixture of

N_{2}, H_{2}

and

{NH}_{3}

700 K

contains

0.036 {MN}_{2}

and

0.15 {MH}_{2} .

At this temperature,

K_{c}

for the reaction

N_{2} (g) + 3 H_{2} (g) ⇌ 2 {NH}_{3} (g)

0.29 .

If concentration of

{NH}_{3}

at equilibrium is

5.9 \times 10^{- y}

then calculate the value of

' y' .

HARD

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>EXERCISE-3>Q 16

46 ° C, K_{p}

for the reaction

N_{2} O_{4} (g) ⇌ 2 {NO}_{2} (g)

0.667 atm .

Compute the percent dissociation of

N_{2} O_{4}

46 ° C

at a total pressure of

380

Torr.

HARD

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>EXERCISE-3>Q 17

At some temperature and under a pressure of

4 atm, {PCl}_{5}

10 %

dissociated. Calculate the pressure at which

{PCl}_{5}

will be

20 %

dissociated, temperature remaining same.

HARD

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>EXERCISE-3>Q 18

In a mixture of

N_{2}

and

H_{2}

in the ratio of

1 : 3

64

atmospheric pressure and

300 ° C

, the percentage of ammonia under equilibrium is

33.33

by volume. If the equilibrium constant of the reaction using the equation.

$N_{2} (g) + 3 H_{2} (g) ⇌ 2 {NH}_{3} (g) is 1.3 \times 10^{- Z}$

then calculate value of $z$ .

HARD

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>EXERCISE-3>Q 19

The system

N_{2} O_{4} ⇌ 2 {NO}_{2}

maintained in a closed vessel at

60 ° C

& pressure of

5

atm has an average (i.e. observed) molecular weight of

69,

at what pressure at the same temperature would the observed molecular weight be

(\frac{230}{3})

HARD

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>EXERCISE-3>Q 20

The vapour density of

N_{2} O_{4}

at a certain temperature is

30 .

Calculate the percentage dissociation of

N_{2} O_{4}

at this temperature.

N_{2} O_{4} (g) ⇌ 2 {NO}_{2} (g)

HARD

JEE Main/Advance

IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>EXERCISE-3>Q 21

Solid Ammonium carbamate dissociates as :

{NH}_{2} {COONH}_{4} (s) ⇌ 2 {NH}_{3} (g) + {CO}_{2} (g) .

In a closed vessel solid ammonium carbamate is in equilibrium with its dissociation products. At equilibrium, ammonia is added such that the partial pressure of

{NH}_{3}

at new equilibrium now equals the original total pressure. Calculate the ratio of total pressure at new equilibrium to that of original total pressure.

The pKa of acetyl salicylic acid (aspirin) is 3.5. The pH of gastric juice in human stomach is about 2-3 and pH in the small intestine is about 8. Aspirin will be:

Important Questions on Equilibrium

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The ${pK}_{a}$ of acetyl salicylic acid (aspirin) is 3.5. The pH of gastric juice in human stomach is about 2-3 and pH in the small intestine is about 8. Aspirin will be: