Schiffs reagent is obtained by passing ...... gas in aqueous solution of Para rosaniline hydrogen chloride :

O_{2}

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S O_{2}

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N O_{2}

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C O_{2}

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Solution

The correct option is B $S O_{2}$
When sulphur dioxide gas is passed through magenta coloured solution of p-rosaniline hydrochloride, a colourless solution known as Schiff reagent is obtained.

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