Phosphorus pentachloride dissociates as follows, in a closed reaction vessel
PCl₅ (g) $$\leftrightharpoons$$ PCl₃ (g) + Cl₂ (g)
If total pressure at equilibrium of the reaction mixture is P and degree of dissociation of PCl₅ is x, the partial pressure of PCl₃ will be

The equilibrium constant for the reaction
SO₃ (g) $$\leftrightharpoons$$ SO₂ (g) + $$1 \over 2$$ O₂ (g)
is K_c = 4.9 $$\times$$ 10^–2. The value of K_c for the reaction
2SO₂ (g) + O₂ (g) $$\leftrightharpoons$$ 2SO₃ (g) will be :

Given the data at 25^oC,
Ag + I^- $$\to$$ AgI + e^- , E^o = 0.152 V
Ag $$\to$$ Ag⁺ + e^-, E^o = -0.800 V
What is the value of log K_sp for AgI? (2.303 RT/F = 0.059 V)

CH₃Br + Nu^- $$\to$$ CH₃ - Nu + Br^- The decreasing order of the rate of the above reaction with nucleophiles (Nu^–) A to D is
[Nu^– = (A) PhO^–, (B) AcO^–, (C) HO–, (D) CH₃O^–]