Rohit is studying the iodoform reaction by using the following compounds: (P) (Q) (R) (S) Which of…
Rohit is studying the iodoform reaction by using the following compounds:
(P) $\text{CH}_3\text{OH}$
(Q) $\text{CH}_3\text{CHO}$
(R) $\text{CH}_3\text{COCH}_3$
(S) $\text{CH}_3\text{CH}_2\text{-CO-CH}_2\text{-CH}_3$
Which of the following combinations will give an iodoform test when the compounds are heated separately with iodine and aqueous $\text{NaOH}$?
- (a)Only (P) and (Q)
- (b)Only (Q) and (R)
- (c)Only (P) and (S)
- (d)Only (Q) and (S)
Answer
Answer
AIWritten by AI (gemini) - it can contain mistakes.
Correct option: (b)
Answer: (b) Only (Q) and (R)
The iodoform test requires a methyl ketone group ($\text{CH}_3\text{C=O}$) or a $\text{CH}_3\text{CH(OH)}-$ group. Acetaldehyde (Q) and acetone (R) contain the methyl carbonyl group, while methanol (P) and pentan-3-one (S) do not.
From ISC 2026 Chemistry Paper 1, question 1(B)(iv).