A gaseous mixture was prepared by taking equal moles of CO and N₂, If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen (N₂) in the mixture is

• 0.8 atm

• 0.9 atm

• 1 atm

• 0.5 atm

If x is the amount of adsorbate and m is the amount of adsorbent, which of the following relations is not related to adsorption process?

• 

• p = f(T) at constant (x/m)

• 

• 

Which of the two ions from the list given below have the geometry that is explained by the same hybridization of orbitals

If the enthalpy change for the transition of liquid water to steam is 30kJ mol^-1 at 27^oC, the entropy change for the process would be. 

• 1.0 J mol^- K^-1

• 0.1 J mol^-1 K^-1

• 100 J  mol^-1 K^-1

• 10 J mol^-1 K^-1

The Correct order of increasing bond length of C - H, C-O, C - C and C = C is

• C - C < C=C < C - O < C - H

• C - O < C - H < C - C < C = C

• C - H < C - O <  C - C < C= C

• C - H  < C = C < C - O < C - C

Which of the following is least likely to behave as Lewis base? 

• NH₃

• BF₃

• OH^-

• H₂O

A buffer solution is prepared in which the concentration of NH₃ is 0.30 M and the concentration of NH₄ is 0.20 M. If the equilibrium constant, K_b for NH₃ equals 1.8 x 10^-5, what is the pH of this solution?

log ( 2.7 = 0.43)

• 9.43

• 11.72

• 8.73

• 9.08

Which of the following is the correct option for free expansion of an ideal gas under an adiabatic condition?

Enthalpy change for the reaction,

4H (g) → 2H₂ (g) is - 869.6 kJ

The dissociation energy of H - H bond is

• -869.6 kJ

• +434.8 kJ

• +217.4 kJ

• +217.4 kJ

10.

Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49u. Molecular mass of B will be

• 12.25 u

• 6.50 u 

• 25.00 u

• 25.00 u