Concentration of the Ag⁺ ions in a saturated solution of Ag₂C₂O₄ is 2.2 $$ \times $$ 10^$$-$$4 mol L^$$-$$1. Solubility product of Ag₂C₂O₄ is

A 20 litre container at 400 K contains CO_2(g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO₂ attains its maximum value, will be

(Given that : SrCO_3(s) $$\rightleftharpoons$$ SrO_(s) + CO_2(g), K_p = 1.6 atm)

The correct statement regarding electrophile is

The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is