The volume of a closed reaction vessel in which the following equilibrium reaction occurs is halved. 2 SO 2 g + O 2 g ⇌ 2 SO 3 g As a result,

The rate of forward reaction will become double that of reverse reaction and the equilibrium will shift to the right.

The rates of forward and backward reactions will remain the same.

The equilibrium will not shift.

The equilibrium will shift to the right.

For the reaction: 2 NO 2 g ⇌ 2 NO g + O 2 g , K c = 1 .8 × 10 - 6 at 184 o C , R = 0 .0831 J / molK When K p and K c are compared at 184 o C. It is found that

Whether K p is greater than, less than or equal to K c depends upon the total gas pressure.

The exothermic formation of ClF 3 is represented by the following equation: Cl 2 g + 3 F 2 g ⇌ 2 ClF 3 g ; ΔH = - 329 kJ Which of the following will increase the quantity of ClF 3 in the equilibrium mixture of Cl 2 , F 2 and ClF 3 ?

Increasing the volume of the container.

For the reaction 2 BaO 2 s ⇌ 2 BaO s + O 2 g , ΔH = + ve . In the equilibrium condition, the pressure of O 2 is dependent on

the temperature of the equilibrium.

the mass of both BaO 2 and BaO .

E M B I B E

Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 22

HARD

NEET

IMPORTANT

Earn 100

The addition of which among the following does not appreciably affect the solubility of calcium oxalate?

91.67% studentsanswered this correctly

Important Questions on Equilibrium

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 23

One liter of a saturated solution of ${CaCO}_{3}$ is evaporated to dryness when $7.0 mg$ of ${CaCO}_{3}$ is left. The $K_{sp}$ of ${CaCO}_{3}$ is:

HARD

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 24

Two buffers

A

(pH = 4)

and

B

(pH = 6)

are prepared with

{CH}_{3} COOH

(0.5 M)

and a

{CH}_{3} COONa

solution of unknown concentration. What is the

pH

of the solution obtained by mixing equal volumes of these two buffers? (

K_{a}

of

{CH}_{3} COOH

is

10^{- 5}

.)

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 25

There is a buffer of volume

V mL

containing

0.1 M {CH}_{3} COOH

and

0.1 M {CH}_{3} {COO}^{-}

ions. What would be the value of

V

so that the

pH

does not change more than

0.5

units on addition of

10 mL

of

1 M HCl

? (

\log 3.1 = 0.5

)

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 26

What is the $pH$ of a solution obtained by mixing $110 mL$ of $0.1 N {CH}_{3} COOH$ and $10 mL$ of $0.1 N NaOH$ ?

( ${pK}_{a} = 4.74, \log 3 = 0.477$ )

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 27

The solubility of

Mg {(OH)}_{2}

in a buffer of

pH = 10

is found to be

232 \times 10^{- 4} g L^{- 1}

. What is the molar solubility of

Mg {(OH)}_{2}

in pure water?

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 28

The solubility of ${CaCO}_{3}$ is $7 mg L^{- 1}$ . If ${Na}_{2} {CO}_{3}$ is added slowly to a solution containing an equimolar solution of ${Ca}^{2 +}$ and ${Ba}^{+ 2}$ , then the precipitate of ${CaCO}_{3}$ is not formed until $90 %$ of ${Ba}^{2 +}$ has been precipitated as ${BaCO}_{3}$ . The $K_{sp}$ of ${BaCO}_{3}$ is

(Molar mass of ${CaCO}_{3} = 100 g$ .)

HARD

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 29

What is the ratio of the

pH

of a solution containing

1 mol

of

{CH}_{3} COONa

and

1 mol

of

HCl

per litre to the solution containing

1 mol

of

{CH}_{3} COONa

and

1 mol

of

{CH}_{3} COOH

per litre?

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 30

Forward and reverse rate constants for the reaction, $2 {NO}_{(g)} ⇌ N_{2 (g)} + O_{2 (g)},$ are listed on the table. Select the correct statement about the following.