29. Which of the following statements is incorrect?

(a) Entropy is a measure of disorder or randomness.

(b) First law of thermodynamics does not guide us about the direction of chemical reactions

(c) Variables like p, V, T are called state variables or state functions.

(d) The state of the surroundings can always be completely specified.

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