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)

Which one of the following ion has electronic configuration [Ar] 3d⁶?
(At. no:  Mn = 25, Fe = 26, Co = 27, Ni = 28)

• Ni³⁺

• Mn

• Fe³⁺

• Fe³⁺

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

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

• oxidation

• cracking

• distillation under reduced pressure

• distillation under reduced pressure

The tendency of BF₃, BCl₃ and BBr₃ to behave as Lewis acid decreases in the sequence

• BCl₃ > BF₃ > BBr₃

• BBr₃ > BCl₂ > BF₃

• BBr₃ > BF₃ > BCl₃

• BBr₃ > BF₃ > BCl₃

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

• NH₃

• H₂O

• B₂H₆

• B₂H₆

In the following the most stable conformation of n-butane is

18.

Property of the alkaline earth metals that increases with their atomic number

• the solubility of their hydroxides in water

• the solubility of their sulphates in water

• ionisation energy 

• ionisation energy 

Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy? 

• CaSO₄

• BeSO₄

• BaSO₄

• BaSO₄

For the reaction


the value of the rate of disappearance of N₂O₅ is given as 

• 6.25 x 10^-3 mol L^-1s^-1 and 6.25 x 10^-3 mol L^-1 s^-1

• 1.25 x 10^-2 mol L^-1s^-1 and 6.25 x 10^-3 mol L^-1 s^-1

• 6.25 x 10^-3 mol L^-1s^-1 and 3.125 x 10^-3 mol L^-1 s^-1

• 6.25 x 10^-3 mol L^-1s^-1 and 3.125 x 10^-3 mol L^-1 s^-1