An aqueous solution of salt `R` when treated with dil `HCl`, a colourless gas is given out. And the gas so evolved when

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Q 1189880717.     An aqueous solution of salt `R` when treated with dil `HCl`, a colourless gas is given out. And the gas so evolved when passed through acidified `KMnO_4` decolourises `KMnO_4` solution. Find the salt `R`.
A

`NaNO_2`

B

`NaClO_3`

C

`Na_2SO_3`

D

`Na_2CO_3`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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