In which of the following equilibrium K_c and K_p are not equal?

• 2NO (g) ⇌ N₂ (g)  + O₂ (g)

• SO₂ (g) + NO₂ (g) ⇌ SO₃ (g) + NO (g)

• H₂ (g) + I₂ (g) ⇌ 2 HI (g)

• H₂ (g) + I₂ (g) ⇌ 2 HI (g)

In a buffer solution containing an equal concentration of B^- and HB, the K_b for B^- is 10^-10.The pH of buffer solution is

• 10

• 7

• 6

• 6

The reaction,

2A (g) + B (g)  ⇌ 3C (g) + D (g) 

is begun with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of  D is measured and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression

• [(0.75)³ (0.25)] / [(1.00)² (1.00)]

• [(0.75)³ (0.25) ] / [(0.50)²(0.75)]

• [(0.75)³(0.25)] / [(0.50)²(0.75)]

• [(0.75)³(0.25)] / [(0.50)²(0.75)]

Which of the following molecules acts as a Lewis acid?

• (CH)₃B

• (CH₃)O

• (CH₃)P

• (CH₃)P

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

• 5.65 x 10^-10

• 6.50 x 10^-12

• 5.65 x 10^-13

• 5.65 x 10^-13

Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO₃ and Conc. H₂SO₄.In the mixture, nitric acid acts as a/an:

• reducing agent

• acid

• base

• base

The dissociation constants for acetic acid and HCN at 25^o C are 1.5 X 10^-5 and 4.5 x 10^-10 respectively. The equilibrium constant for the equilibrium,

CN^- + CH₃COOH  and HCN + CH₃COO^-

would be

• 3 x 10⁵

• 3.0 x 10^-5

• 3.0 x 10^-4

• 3.0 x 10^-4

Equal volumes of three acid solutions of pH 3.4 and 5 are mixed in a vessel. What will be the H⁺ ion concentration in the mixture?

• 1.11 x 10^-4 M

• 3.7 x 10^-4 M 

• 3.7 x 10^-3 M

• 3.7 x 10^-3 M

469.

If the concentration of OH^- ions in the reaction Fe(OH)₃ (s)  ⇌ Fe³⁺ (aq) + 3OH^-(aq) is decreased by 1/4 times, then equilibrium concentration of Fe³⁺ will increase by 

• 8 times

• 16 times

• 64 times

• 64 times

Base strength of 



is in the order of 

• (2) > (1) > (3)

• (3) > (2) > (1) 

• (1) > (3)> (2) 

• (1) > (3)> (2)