Molal depression constant for a solvent is 4.0 kg mol^–1. The depression in the freezing point of the solvent for 0.03 mol kg^–1 solution of K₂SO₄ is :
(Assume complete dissociation of the electrolyte)

The maximum number of possible oxidation states of actinoides are shown by :

The major product of the following reaction is:

Which of the following potential energy (PE) diagrams represents the S_N1 reaction?