The maximum number of electrons that can have principal quantum number, n = 3, and spin quantum number, m_s = − 1/2 , is

The difference in the oxidation numbers of the two types of sulphur atoms in Na₂S₄O₆ is

Bombardment of aluminium by $$\alpha$$-particle leads to its artificial disintegration in two ways : (i) and (ii) as shown. Products X, Y and Z, respectively, are

AgNO₃(aq.) was added to an aqueous KCl solution gradually and the conductivity of the solution was measured. The plot of conductance ($$\Lambda $$) versus the volume of AgNO₃ is