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MODEL PAPER 1 — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryMODEL PAPER 11 Mark
Question
Assertion $(A): RCHO, RCOCH_3 $ and cyclic ketones react with sodium bisulphite.
Reason $(R):$ Crystalline solid derivatives are formed when aldehydes or ketones are shaken with saturated aqueous solution of sodium bisulphite.
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Answer

$\mathrm{SO}_3^{--}$ is a large ion. Its addition is possible only under the condition that Image grouping is not sterically hindered as is the case for $RCHO, RCOCH_3$ and cyclic ketones.

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