15. Calculate the enthalpy change for the process

CCl₄(g) → C(g) + 4 Cl(g)

and calculate bond enthalpy of C – Cl in CCl₄(g).

Δ_vapH^?(CCl₄) = 30.5 kJ mol–1.

Δ_fH^? (CCl₄) = –135.5 kJ mol–1.

Δ_aH^? (C) = 715.0 kJ mol–1, where Δ_aH^? is enthalpy of atomisation

Δ_aH^? (Cl₂) = 242 kJ mol–1  

HCP crystal is made of A ions and B ions are arranged in 2/3rd of octahedral voids. The simplest formula of compound is :-

Which of the following is a carbonate ore ?

Which of the following complex is paramagnetic, inner orbital complex and coloured :-

The orbital angular momentum of 3d electron is

For the reaction, CaCO₃(s) → CaO(s) + CO₂(g) △H = 82.8 kJ at 25°C, △U at 25°C is