Question

Which of the following process does not occur during the formation of \[CHC{l_3}\] from \[{C_2}{H_5}OH\;\] and \[CaOC{l_2}\] ?
A) Hydrolysis
B) Oxidation
C) Reduction
D) Chlorination

Answer 1

Hint:Nascent oxygen can be released from \[CaOC{l_2}\], so it acts as a good oxidizing agent. Also we get chlorine gas and calcium hydroxide from bleaching powder which is the common name of \[CaOC{l_2}\].

Complete step-by-step answer:Bleaching powder is heated with ethanol. In this reaction, the bleaching powder plays the role of an oxidising and chlorinating agent. The Calcium hydroxide and chlorine produced from bleaching agent help in haloform reaction. Then let's see how bleaching powder acts as an oxidising, chlorinating agent, and the products of the reaction can hydrolysed easily. The reaction sequence is
\[C{H_{3}}C{H_{2}}OH + [O] \to C{H_3}CHO + {H_{2}}O\]
The above reaction is oxidation.

\[C{H_{3}}CHO + 3C{l_2} \to CC{l_3}CHO + 3HCl\]
The above reaction is chlorination

\[2CC{l_{3}}CHO + Ca{(OH)_2} \to 2CHC{l_{3}} + Ca{(COOH)_2}\]
The above reaction is hydrolysis.

Hence, Reduction does not happen here.

Option ‘C’ is correct

Additional Information:Chloroform is also used as an anesthetic. It is produced by the chlorination of methane. To prepare chloroform which is a volatile and colorless liquid that is widely used as a solvent and precursor to other organic compounds also known as trichloromethane.

Note: Bleaching powder is heated with ethanol to make chloroform. The formation of chloroform is due to the haloform reaction. The halogen which is chlorine here reacts with ethanal which is produced after oxidation of ethanol in the presence of base calcium hydroxide.