Aldehydes and Ketones - Result Question 39
####40. Which of the following is an example of aldol condensation?
(a) $2 CH _3 CHO \xrightarrow{\text { Dil. } NaOH} CH _3 CH(OH) CH _2 CHO$
$(1989,1 M)$
(c) $2 HCHO \xrightarrow{\text { Dil. } NaOH} CH _3 OH+HCOONa$
(d) $C _6 H _5 CHO+HCHO \xrightarrow{\text { Dil. } NaOH} C _6 H _5 CH _2 OH+HCOONa$
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Answer:
Correct Answer: 40. (b)
Solution:
- $2 CH _3 CHO \xrightarrow{\text { Dil. } NaOH}$
Aldol
$$ 2 HCHO \xrightarrow{\text { Dil. } NaOH} CH _3 OH+HCOONa $$
$$ \text { Cannizzaro reaction } $$
$C _6 H _5 CHO+HCHO \xrightarrow{\text { Dil. } NaOH} C _6 H _5 CH _2 OH+HCOONa$
Cannizzaro reaction
