For the reaction N₂(g) + O₂(g)$\rightleftharpoons$ 2NO(g) the equilibrium constant is K₁. The equilibrium

constant is K₂  for the reaction 2NO(g) + O₂(g)$\rightleftharpoons$   2NO₂(g). What is K for the reaction

NO₂(g) $\rightleftharpoons$ + 1/2N₂(g)+ O₂(g)?

1. 1 / (4 K₁K₂)

2. [1 / K₁K₂)^1/2

3. 1 / (K₁K₂)

4. 1 / (2K₁K₂)

K_c and K_p are not equal for a reaction given below:

1. 2NO(g) $\rightleftharpoons$N₂(g) + O₂(g)

2. SO₂(g) + NO₂(g) $\rightleftharpoons$SO₃(g) + NO(g)

3. H₂(g) + I₂(g) $\rightleftharpoons$2HI(g)

4. 2C(s) + O₂(g) $\rightleftharpoons$2CO₂(g)

Which one of the following molecular hydrides acts as a Lewis acid?

1. NH₃         

2. H₂O         

3. B₂H₆           

4. CH₄

The ionisation constant of ammonium hydroxide is 1.77 x 10^-5 at 298 K. Hydrolysis constant of ammonium chloride is

1. 5.65 x 10^-10

2. 6.50 x 10^-12

3. 5.65 x 10^-13

4. 5.65 x 10^-12

The oxide that is not expected to react with sodium hydroxide is : 

1. B₂O₃           

2. CaO

3. SiO₂             

4. BeO

Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?

(1) SrCl₂                             

(2) BaCl₂

(3) MgCl₂                           

(4) CaCl₂

The value of equilibrium constant of the reaction HI (g) $\rightleftharpoons$ $\frac{1}{2}$ H₂(g) + $\frac{1}{2}$ I₂(g) is 8.0. The equilibrium constant of the reaction

H₂(g) + I₂(g) $\rightleftharpoons$2HI(g) will be

$$\begin{gathered} 1.<mspace\; width="1em"></mspace>\frac{1}{16} \\ 2.<mspace\; width="1em"></mspace>\frac{1}{64} \\ 3.<mspace\; width="1em"></mspace>16 \\ 4.<mspace\; width="1em"></mspace>\frac{1}{8} \end{gathered}$$

The pOH of a solution at 25$°$C that contains 1 x 10^-10 M of hydronium ions is:  

1. 7.00                               

2. 4.00

3. 9.00                                 

4. 1.00

Which one of the following ionic species has the greatest proton affinity to form stable compound?

(1) HS^-                         

(2) ${\mathrm{NH}}_2^{-}$

(3) F^-                           

(4) I^-

Given the reaction:

\(\mathrm{Cu}(\mathrm{~s})+2 \mathrm{Ag}^{+}(\mathrm{aq}) \rightarrow \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{Ag}(\mathrm{~s})\) with E° = 0.46 V at 298 K,
what is the equilibrium constant for the reaction?