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Salt +`H_(2)SO_(4)` (dilute) `to` Coloured vapours which turns starch iodide paper blue.Identify the acid radical and the coloured vapours giving the

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Salt +`H_(2)SO_(4)` (dilute) `to` Coloured vapours which turns starch iodide paper blue.Identify the acid radical and the coloured vapours giving the relevant chemical equations.
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Correct Answer - `2NO_(2)^(-) + H_(2)SO_(4) to SO_(4)^(2-) + 2HNO^(2)`
`3HNO_(2) to HNO_(3)+2NO+O_(2)`
`2NO+O to 2NO_(2) uarr` (Reddish brown)
`2KI+2NO_(2) to 2KNO_(2) +I_(2)`
Starch `+I_(2) to` blue
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