The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are :

Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect ?

(The Bohr radius is represented by a₀)

The major products A and B for the following reactions are, respectively:

During compression of a spring the work done is 10kJ and 2kJ escaped to the surroundings as heat. The change in internal energy, $$\Delta $$U(inkJ) is :