Chemistry Test ...

Directions: The following question has four choices out of which ONLY ONE is correct.

The enthalpy of neutralization of HCN by NaOH is - 12kJ/mol. The enthalpy of ionization of HCN is

Directions: The following question has four choices out of which ONLY ONE is correct.

Dissolution of ammonium chloride in water is an endothermic change. At constant temperature, it is accompanied by

If 150 kJ of energy is needed for a man to walk a distance of 1 km, then how much glucose does one have to consume to walk a distance of 5 km, provided that only 30% of energy is available for muscular work? (The enthalpy of combustion of glucose is 3000 kJ mol^-1.)

In which of the following cases is rate of reaction not affected by pressure?

Consider the following reactions:

NO₂ ⇌ N₂ + O₂, K₁

N₂O₄ ⇌ 2NO₂, K₂

Give the equilibrium constant for the formation of N₂O₄ from N₂ and O₂.

In 2HI ⇌ H₂ + I₂, the equilbrium is not affected by:

What is the relation between K_p and K_c in the following reaction?

N₂(g) + 3H₂(g) 2NH₃(g)

The favourable conditions for Haber's process are:

For the following reaction, 1 g mole of CaCO₃ is enclosed in a 5 L container.

CaCO₃ (s) CaO (s) + CO₂ (g)

Kp = 1.16 at 1073 K

The percent dissociation of CaCO₃ in the above reaction is

If at any temperature, Kp is the equilibrium constant for the reaction N₂ (g) + 3H₂ (g) ⇌ 2 NH₃ (g), then what will be the effect of increasing the pressure from 5 atm to 50 atm?