A) acidic,\[Zn-Hg\]
B) alcoholic,\[N{{a}_{2}}S{{O}_{3}}\]
C) saturated aqueous,\[NaHS{{O}_{3}}\]
D) aqueous,\[NaCl\]
Correct Answer: C
Solution :
\[\underset{acetaldehyde}{\mathop{C{{H}_{3}}CHO}}\,+\underset{\begin{smallmatrix} sodium \\ bisulphite \end{smallmatrix}}{\mathop{NaHS{{O}_{3}}}}\,\xrightarrow[{}]{{}}\underset{(white\,crystalline\,ppt).}{\mathop{{{H}_{3}}C-\underset{\begin{smallmatrix} | \\ S{{O}_{3}}Na \end{smallmatrix}}{\overset{\begin{smallmatrix} OH \\ | \end{smallmatrix}}{\mathop{C}}}\,-H}}\,\]
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