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Which of the following compounds gives trichloromethane on distilling with bleaching powder
Options
(a) Methanal
(b) Phenol
(c) Ethanol
(d) Methanol
Correct Answer:
Ethanol
Explanation:
Alcohol is first oxidised to acetaldehyde by chlorine. [Cl₂ + H₂O → 2HCl + O]. CH₃CH₂OH + O → CH₃CHO + H₂O. (ii) Acetaldehyde then reacts with chlorine to form chloral. CH₃CHO + 3Cl₂ → CCl₃ CHO + 3HCl.(iii) Chloral, thus formed, is hydrolysed by calcium hydroxide. CCl₃CHO + Ca(OH)₂ → 2CHCl₃ + (HCOO)₂Ca.
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Topics: Haloalkenes and Haloarenes
(78)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Oleic,stearic and palmitic acids are
- Standard electrode potential for Sn⁴⁺/Sn²⁺ couple is +0.15 V and that for the
- In a zero-order reaction.for every 10°C rise of temperature ,the rate is doubled.
- How much quick lime can be obtained from 25g of CaCO₃?
- At higher temperature,iodoform reaction is given by
Topics: Haloalkenes and Haloarenes (78)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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