KCET2011ChemistryAldehydes and Ketones

The reagent with which both acetaldehyde and acetone react is

Options

AFehling's solution
BI ₂ / NaOH
CTollen's reagent
Dcarbonic acid

Correct answer

B. I ₂ / NaOH

Step-by-step solution

Due to the presence of group, acetaldehyde and acetone react with iodine in sodium hydroxide to give yellow ppt of iodoform. CH ₃ CHO +3 I ₂+3 NaOH Cl ₃ CHO +3 NaI +3 H ₂ O Cl ₃ CHO + NaOH CHI ₃+ HCOONa CH ₃ COCH ₃+3 I ₂+3 NaOH Cl ₃ COCH ₃+3 NaI +3 H ₂ O Cl ₃ COH ₃+ NaOH CHI ₃+ CH ₃ COONa ⁻ CHI ₃ is Iodoform.

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