11.

Which one of the following has the regular tetrahedral structure?

• XeF₄

• [Ni(CN)₄]^2-

• BF₄^-

• BF₄^-

Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?

• (n -1)d⁸ ns²

• (n-1)d⁵ ns²

• (n-1)d³ ns²

• (n-1)d³ ns²

As the temperature is raised from 20°C to 40°C, the average kinetic energy of neon atoms changes by a factor of which of the following?

• 1/2

• 2

• 313/293

• 313/293

The maximum number of 90° angles between bond pair of electrons is observed in

• dsp³ hybridization

• sp³d² hybridization

• dsp² hybridization

• dsp² hybridization

In Vander Waals equation of state of the gas law, the constant ‘b’ is a measure of 

• intermolecular repulsions

• intermolecular collisions per unit volume

• Volume occupied by the molecules

• Volume occupied by the molecules

The conjugate base of H₂PO₄^- is

• PO₄^3-

• HPO₄^2-

• H₃PO₄

• H₃PO₄

An ideal gas expands in volume from 1×10^-3 m³ to 1×10^-2 m³ at 300 K against a constant pressure of 1×10⁵ Nm^-2. The work done is

• -900 J

• 900 J

• 2780 J

• 2780 J

What is the equilibrium expression for the reaction P₄(s) +5O₂(g)⇌ P₄O₁₀(s)? 

• Kc = [P₄O₁₀] / P₄] [O₂]⁵

• K_c = 1/[O2]⁵

• K_c = [O2] 5

• K_c = [O2] 5

For the reaction, CO(g) + Cl2(g) ⇌ COCl₂(g) the K_p/K_c is equal to

• 1/RT

• 1.0

• √RT

• √RT

The equilibrium constant for the reaction N₂(g) + O₂(g) ⇌ 2NO(g) at temperature T is 4×10^-4. The value of K_c for the reaction NO(g) ⇌ 1/2N₂(g) + 1/2O₂(g) at the same temperature.

• 2.5×10²

• 0.02

• 4 x 10^-4

• 4 x 10^-4