Aromatic Aldehydes Ketones and Acids - Result Question 32
####39. The only CORRECT combination that gives two different carboxylic acids is
(a) (IV) (iii) (Q)
(b) (II) (iv) (R)
(c) (I) (i) $(S)$
(d) (III) (iii) (P)
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Answer:
Correct Answer: 39. (b)
Solution:
- $C _6 H _5 CHO+CH _3-\stackrel{O}{C}-O-\stackrel{O}{C}-CH _3$
$$ \underset{\text { Perkin’s condensation }}{CH _3 COOK} C _6 H _5-CH \underset{\text { (Cinnamic acid) }}{CH-COOH} $$
Cinnamic acid shows cis-trans isomerism.
