CBSE Class 12 Chemistry 2022 Term 2 Delhi Set 3

Question : 1 of 12

Marks: +1, -0

SECTION - A

Predict the reagent for carrying out the following transformations:

(a) Benzoyl chloride to Benzaldehyde

(b) Ethanal to 3-hydroxy butanal

Solution:

(i) Rosenmund Reduction in presence of Lindlar's Catalyst

(\mathrm{H}_2 / \mathrm{Pd}-\mathrm{BaSO}_4)

(ii) Aldol Condensation in presence of dil.

\mathrm{NaOH}

(iii) Hell - Volhard Zelinsky Reaction in presence of

\mathrm{Cl}_2 /

Red Phosphorous.

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