Question
Acetaldehyde, when heated in the presence of sodium hydroxide and iodine forms
MHT CET
Chemistry
Aldehydes and Ketones
2026
MHT CET 2026 (11 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. Sodium formate
- B. Sodium acetate
- C. Ethanol
- D. Iodoethane
Answer
A. Sodium formate
Step-by-step solution
Acetaldehyde (CH_3CHO) contains a CH_3-CO- group, so it undergoes the iodoform reaction when heated with iodine and sodium hydroxide. The reaction proceeds as follows: CH_3CHO + 3I_2 + 4NaOH CHI_3 + HCOONa + 3NaI + 3H_2O The products formed are iodoform (CHI_3) as a yellow precipitate and sodium formate (HCOONa). Answer: Sodium formate
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