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

The reaction, $$3Cl{O^ - }(aq)$$$$ \to ClO_3^ - (aq) + 2C{l^ - }(aq)$$ is an example of :

Amongst the following identify the species with an atom in +6 oxidation state

The normality of 0.3 M phosphorus acid (H₃PO₃) is