The rate constant (k) of a reaction is measured at differenct temperatures (T), and the data are plotted in the given figure. The activation energy of the reaction in kJ mol^–1 is :
(R is gas constant)

The compound that has the largest H–M–H bond angle (M = N, O, S, C) is :

Considering that $$\Delta $$₀ > P, the magnetic moment
(in BM) of [Ru(H₂O)₆]²⁺ would be _________.

The correct order of the ionic radii of
O^2–, N^3–, F^– , Mg²⁺, Na⁺ and Al³⁺ is :