Match the reactions in Column I with nature of the reactions/type of the products in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 $$\times$$ 4 matrix given in the ORS.

	Column I		Column II
(A)	$$\mathrm{O_2^ - \to {O_2} + O_2^{2 - }}$$	(P)	redox reaction
(B)	$$\mathrm{CrO_4^{2 - } + {H^ + }}$$	(Q)	one of the products has trigonal planar structure
(C)	$$\mathrm{MnO_4^ - + NO_2^ - + {H^ + } \to}$$	(R)	dimeric bridged tetrahedral metal ion
(D)	$$\mathrm{NO_3^ - + {H_2}S{O_4} + F{e^{2 + }} \to }$$	(S)	disproportionation

Match the compounds/ions in Column I with their properties/reactions in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 $$\times$$ 4 matrix given in the ORS.

	Column I		Column II
(A)	$$\mathrm{C_6H_5CHO}$$	(P)	gives precipitate with 2, 4-dinitrophenylhydrazine
(B)	$$\mathrm{CH_3C\equiv CH}$$	(Q)	gives precipitate with $$\mathrm{AgNO_3}$$
(C)	$$\mathrm{CN^-}$$	(R)	is a nucleophile
(D)	$$\mathrm{I^-}$$	(S)	is involved in cyanohydrin formation

Match the crystal system/unit cells mentioned in Column I with their characteristic features mentioned in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 $$\times$$ 4 matrix given in the ORS.

	Column I		Column II
(A)	Simple cubic and face-centred cubic	(P)	have these cell parameters $$a=b=c$$ and $$\alpha=\beta=\gamma$$
(B)	cubic and rhombohedral	(Q)	are two crystal systems
(C)	cubic and tetragonal	(R)	have only two crystallographic of 90$$^\circ$$
(D)	hexagonal and monoclinic	(S)	belong to same crystal system

Let $${E^c}$$ denote the complement of an event $$E.$$ Let $$E, F, G$$ be pairwise independent events with $$P\left( G \right) > 0$$ and $$P\left( {E \cap F \cap G} \right) = 0.$$ Then $$P\left( {{E^c} \cap {F^c}|G} \right)$$ equals