Organic Compounds Containing Halogens Question 69
Question: Which of the following compounds gives trichloromethane on distilling with bleaching powder
[KCET 2004; EAMCET 1986]
Options:
A) Methanal
B) Phenol
C) Ethanol
D) Methanol
Show Answer
Answer:
Correct Answer: C
Solution:
$ \underset{\text{Bleaching powder}}{\mathop{CaOCl_2}}+H_2O\to Ca{{(OH)}_2}+Cl_2 $
$ Cl_2+H_2O\to 2HCl+O $
$ \underset{ethanol}{\mathop{C_2H_5OH}}+O\to \underset{Acetaldehyde}{\mathop{CH_3CHO}}\ +H_2O $
$ CH_3CHO+3Cl_2\to \underset{chloral}{\mathop{CCl_3CHO}}+3HCl $
$ 2CCl_3CHO+Ca{{(OH)}_2}\to \underset{\begin{smallmatrix} \text{chloroform or } \\ trichloromethane \end{smallmatrix}}{\mathop{2CHCl_3}}+{{(HCOO)}_2}Ca $
BETA
