The solubility product constant (Ksp) of Fe(OH)₂ at 25°C is 1.6 × 10⁻¹⁴. The molar solubility of Fe(OH)₂ in a solution of pH 8 is:

1. 0.06

2. 0.016

3. 0.01

4. 0.16

Find the values of Kₚ/Kc for the following gaseous reactions:

I. 2A + 3B ⇌ 2C
II. 2A ⇌ 4B
III. A + B + 2C ⇌ 4D

In the following reaction

${\mathrm{HC}}_2{\mathrm{O}}_4^{-}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{PO}}_4^{3-}<mspace\; width="1em"></mspace>\rightleftharpoons {\mathrm{HPO}}_4^{2-}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{C}}_2{\mathrm{O}}_4^{2-}$ 

Which are the two Bronsted bases ?

1. ${\mathrm{H}}_2{\mathrm{C}}_2{\mathrm{O}}_4^{-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{PO}}_4^{3-}$

2. ${\mathrm{HPO}}_4^{2-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{C}}_2{\mathrm{O}}_4^{2-}$

3. ${\mathrm{H}}_2{\mathrm{C}}_2{\mathrm{O}}_4^{-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{HPO}}_4^{-2}$

4. ${\mathrm{PO}}_4^{3-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{C}}_2{\mathrm{O}}_4^{2-}$

The conjugate acid of azide ion is:

1. NH₃                 2. N₃H

3. N₂H₄                4. ${\mathrm{N}}_2^{-}$

The pH of 0.1 M solution of anilium chloride is (K_a of ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_3^{+}$ = 10^-6)

(1) 3.5

(2) 3

(3) 4.5

(4) none of these

The value of $∆$H for the reaction,

   X₂(g) + 4Y₂(g) $\rightleftharpoons$2XY₄ (g)

is less than zero. Formulation of XY₄(g) will be favored at:                           

1. Low pressure and Low temperature

2. High temperature and Low pressure

3. High pressure and Low temperature

4. High temperature and High pressure

Which salt undergoes hydrolysis?

1. CH₃COONa                                     

2. KNO₃

3. NaCl                                               

4. K₂SO₄