1.

The only incorrect combination is-

Answer»

(II)(ii)(R)
(I)(i)(S)
(IV)(iii)(Q)
(III)(iv)(P)

SOLUTION :`SO_3^(-2)+H_2SO_4(dil.)toSO_2(UARR)+H_2O`
`SO_2` turns baryata water milky
`Cr_2O_7^(-2)+3SO_2+2H^(+)tounderset(Green)(2Cr^(+3)darr)+SO_4^(-2)+H_2O`
`SO_2+[Fe(CN)_5NO]^(-2)TOX`
`2MnO_4^(-)+5SO_2+2H_2Oto5SO_4^(-2)+2MN^(+2)+4H^(+)`


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