Question

Which of the following compounds gives trichloromethane on distilling with bleaching powder.

• A. Methanal
• B. Phenol
• C. Ethanol
• D. Methanol

Answer 1

Answer: (C)

Ethanol

Answer 2

$\underset{\text{Bleaching powder}}{CaOCl_{2}} + H_{2}O \rightarrow Ca(OH)_{2} + Cl_{2}$

$Cl_{2} + H_{2}O \rightarrow 2HCl + O$

$\underset{\text{ethanol}}{C_{2}H_{5}OH} + O \rightarrow \underset{\text{Acetaldehyde}}{CH_{3}CHO}\mspace{6mu} + H_{2}O$

$CH_{3}CHO + 3Cl_{2} \rightarrow \underset{\text{chloral}}{CCl_{3}CHO} + 3HCl$

& \text{chloroform or } \\ & \text{trichloromethane} \end{aligned}}{2CHCl_{3}} + (HCOO)_{2}Ca$$