Q 2579801716.     In the following reaction scheme:

`[X] + H_2SO_4 -> [Y]` a colourless gas with irritating smell
`[Y] + K_2Cr_2O_7 + H_2SO_4 ->` green solution

[X] and [Y] are

JEE 2003 Prelims
A

`SO_3^(2-), SO_2`

B

`Cl^(-) , HCl`

C

`S^(2-) , H_2S`

D

`CO_3^(-) , CO_2`

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