Question

$ C{{H}_{3}}CHO+C{{H}_{3}}MgBr\xrightarrow[{}]{{}}A $ Compound A, is

• A. a perimary alcohol
• B. a secondary alcohol
• C. a tertiary alcohol
• D. $ C{{H}_{3}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}} $

Answer 1

Answer: (B)

Acetaldehyde gives isopropyi alcohol on hydrolysis with Grignard's reagent. Isopropyi alcohol is a secondary alcohol. $ \underset{acetaldehyde}{\mathop{C{{H}_{3}}-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-H}}\,+C{{H}_{3}}MgBr\xrightarrow[{}]{{}}C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} OMgBr \\ | \end{smallmatrix}}{\mathop{C}}}\,-H $