In the above diagram if a systems from initial state A (P₁,V_1,T₁) goes to final state C (P₂ ,V₂ ,T₁) from 3 different paths: Path 1 is A to C, Path 2 is A to B to C, Path 3 is A to D to C If 5 kJ of work is done by system in Path A to C then how much heat is transferred during Path A to D is:

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