The incorrect expression among the following is

• 

• In isothermal process
  
  

• 
• 

The species which can best serve as an initiator for the cationic polymerization is

• LiAlH₄

• HNO₃

• AlCl₃

• AlCl₃

The standard reduction potentials for Zn²⁺/ Zn, Ni²⁺/ Ni, and F²⁺/ Fe are –0.76, –0.23 and –0.44 V respectively. The reaction X + Y²⁺ → X ²⁺ + Y will be spontaneous when

• X = Ni, Y = Fe

• X = Ni, Y = Zn

• X =Fe, Y= Zn

• X =Fe, Y= Zn

The equilibrium constant (Kc) for the reaction, N₂(g) + O₂ (g) → 2NO (g) at temperature T is 4 x 10-4. The value of Kc for the reaction  at the same temperature is

• 0.02

• 2.5 x 10²

• 4 x 10^-4

• 4 x 10^-4

The compressibility factor for a real gas at high pressure is

The electrons identified by quantum numbers n and l:
(a) n = 4, l = 1 (b) n = 4, l = 0 (c) n = 3, l = 2 (d) n = 3 , l = 1
Can be placed in order of increasing energy as

• (c) < (d) < (b) < (a) 

• (d) < (b) < (c) < (a)

• (b) < (d) < (a) < (c)

• (b) < (d) < (a) < (c)

The pH of a 0.1 molar solution of the acid HQ is 3. The value of the ionisation constant, K_a of this acid is

• 3 x 10^–1

• 1 x 10^–3

• 1 x 10^—5

• 1 x 10^—5

The increasing order of the ionic radii of the given isoelectronic species is 

• Cl-, Ca²⁺, K⁺, S^2-

• S^2-, Cl^-, Ca²⁺,K⁺

• Ca²⁺, K⁺, Cl^-, S^2-

• Ca²⁺, K⁺, Cl^-, S^2-

In which of the following pairs the two species are not isostructural?

• CO₃^2- and NO₃^-

• PCl⁺₄ and SiCl₄

• PF₅ and BrF₅

• PF₅ and BrF₅

Which of the following on thermal decomposition yields a basic as well as an acidic oxide?

• NaNO₃

• KClO₃

• CaCO₃

• CaCO₃