The equilibrium constants K_P1 and K_P2 for the reactions X ⇌2Y and Z ⇌ P + Q, respectively are in the ratio of 1 : 9. If the degree of dissociation of X and Z be equal then the ratio of total pressure at these equilibria is

• 1:1

• 1:36

• 1:9

• 1:9

Oxidising power of chlorine in aqueous solution can be determined by the parameters indicated below


The energy involved in conversion of 

• 152 kJ mol^-

• -610 kJ mol^-

• -850  kJ mol^-

• -850  kJ mol^-

3.

For the following three reactions a, b and c, equilibrium constants are given

a. CO (g) + H₂O (g) ⇌ CO₂ (g)+ H₂ (g); K₁
b. CH₄(g) + H₂O (g) ⇌ CO (g) + 3H₂ (g); K₂
c. CH₄(g) + 2H₂O (g) ⇌ CO₂ (g) + 4H₂ (g); K₂
Which of the following relations is correct?

• K₁√K₂ = K₃

• K₂K₃ = K₁

• K₃ = K₁K₂

• K₃ = K₁K₂

Standard entropy of X₂, Y₂ and XY₃ are 60, 40 and 50 JK⁻¹
mol −1, respectively. For the reaction,1/2X₂ + 3/2Y₂, ΔH = -30 kJ,to be at equilibrium, the temperature will be

• 1250 K

• 500 K 

• 750 K

• 750 K

Four species are listed below
i. HCO3⁻
ii. H₃O⁺
iii. HSO₄⁻
iv. HSO₃F
Which one of the following is the correct sequence of their acid strength?

•  iv < ii < iii < i

• ii < iii < i < iv

• i < iii < ii < iv

• i < iii < ii < iv

Which one of the following constitutes a group of the isoelectronic species?

Which one of the following pairs of species has the same bond order?

• CN⁻ and NO⁺

• CN⁻ and CN⁺

• O₂⁻ and CN⁻

• O₂⁻ and CN⁻

The ionization enthalpy of a hydrogen atom is 1.312 × 10⁶Jmol⁻¹. The energy required to excite the electron in the atom from n = 1 to n = 2 is 

• 8.51 × 10⁵ Jmol−1

• 6.56 × 10⁵ Jmol⁻¹

• 7.56 × 10⁵ Jmol⁻¹

• 7.56 × 10⁵ Jmol⁻¹

The p_Ka of a weak acid, H_A, is 4.80. The p_Kb of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be 

• 9.58

• 4.79

• 7.01

• 7.01

Identify the wrong statements in the following:

• Chlorofluorocarbons are responsible for ozone layer depletion

• Greenhouse effect is responsible for global warming

• Ozone layer does not permit infrared radiation from the sun to reach the earth

• Ozone layer does not permit infrared radiation from the sun to reach the earth