Alcohols Phenols And Ethers Question 251
Question: The alcohol that produces turbidity immediately with $ ZnCl_2+ $ conc. HCl at room temperature
[EAMCET 1997; MP PMT 1989, 99; IIT JEE 1981, 86; CBSE PMT 1989; CPMT 1989;MP PET 1997; JIPMER 1999]
Options:
A) 1-hydroxybutane
B) 2-hydroxybutane
C) 2-hydroxy-2-methylpropane
D) 1-hydroxy-2-methylpropane
Show Answer
Answer:
Correct Answer: C
Solution:
$ {{(CH_3)}_3}C-OH+HCl\xrightarrow{Anhyd.\ ZnCl_2+HCl} $
$ {{(CH_3)}_3}C-Cl+H_2O $
$ 3^{o} $ reacts immediately $ {{(CH_3)}_3}CH-OH+HCl\xrightarrow{Anhyd.\ ZnCl_2+HCl} $
$ {{(CH_3)}_2}CH-Cl+H_2O $
$ 2^{o} $ reacts after 5 min. $ CH_3CH_2CH_2-OH+HCl\xrightarrow{Anhyd.\ ZnCl_2+HCl} $
$ CH_3CH_2CH_2-Cl+H_2O $
$ 1^{o} $ reacts only on heating.
BETA
