iCON Education - Chemical Equilibrium BITSAT Test

Question 1: Palette 1/4

BITSAT 2022 MCQ

What is [NH$_{4}^+$] in a solution that is 0.02 M NH₃ 0.01 M KOH ? [K_b(NH₃) = 1.8 $\times$ 10^$-$5]

A

3.6 $\times$ 10^$-$5 M

B

1.8 $\times$ 10^$-$5 M

C

0.9 $\times$ 10^$-$5 M

D

7.2 $\times$ 10^$-$5 M

Question 2: Palette 2/4

BITSAT 2022 MCQ

For an isomerisation reaction A $\rightleftharpoons$ B, the temperature dependence of equilibrium constant is given by

log_e K = 4.0 $-$ $\frac{2000}{T}$

The value of $\Delta$S$^\circ$ at Hook is, therefore

A

4R

B

5R

C

400R

D

2000R

Question 3: Palette 3/4

BITSAT 2020 MCQ

1.1 mole of A mixed with 2.2 moles of B and the mixture is kept in a 1 L flask and the equilibrium, A + 2B $\rightleftharpoons$ 2C + D is reached. If at equilibrium 0.2 mole of C is formed then the value of K_c will be

A

0.1

B

0.01

C

0.001

D

1

Question 4: Palette 4/4

BITSAT 2020 MCQ

Sulphuric acid is a dibasic acid. It ionises in two stages and hence has two dissociation constants K_a₁ and K_a₂. Which of the following is the correct observation regarding K_a₁ and K_a₂ ?

A

K_a₁ > K_a₂

B

K_a₁ < K_a₂

C

K_a₁ = K_a₂

D

K_a₁ = 1.2 $\times$ 10^$-$2, K_a₂ > 10