JEE Exam  >  JEE Notes  >  Chapter-wise Tests for JEE Main & Advanced  >  JEE Advanced (Fill in the Blanks): Alcohols, Phenols & Ethers

JEE Advanced (Fill in the Blanks): Alcohols, Phenols & Ethers | Chapter-wise Tests for JEE Main & Advanced PDF Download

Fill in the Blanks

1. Ethanol vapour is passed over heated copper and the product is treated with aqueous NaOH. The final product is ............... . (1983 - 1 Mark)

Ans: aldol (β-hydroxybutanal)

Solution:

JEE Advanced (Fill in the Blanks): Alcohols, Phenols & Ethers | Chapter-wise Tests for JEE Main & Advanced


2. The acidity of phenol is due to the ............... of its anion. (1984 - 1 Mark)

Ans: resonance stabilization


3. Formation of phenol from chlorobenzene is an example of ............... aromatic substitution. (1989 - 1 Mark)

Ans: nucleophilic


4. Phenol is acidic because of resonance stabilization of its conjugate base, namely ............... . (1990 - 1 Mark)

Ans: phenoxide ion


5. Aliphatic ethers are purified by shaking with a solution of ferrous salt to remove ............... which are formed on prolonged standing in contact with air. (1992 - 1 Mark)

Ans: peroxides

Solution: On standing in contact with air, ethers are converted into unstable peroxides (R2O → O) which are highly explosive even in low concentrations. Hence ether
is always purified before distillation. Purification (removal of peroxides) can be done by washing ether with a solution of ferrous salt (which reduces peroxides to alcohols) or by
distillation with conc. H2SO4 (which oxidises peroxides)


6. Glycerine contains one .................. hydroxy group. (1997 - 1 Mark)

 

Ans: secondary

 

 

True / False

1. Sodium ethoxide is prepared by reacting ethanol with aqueous sodium hydroxide.

 

Ans: False

Solution: Ethanol is not acidic enough to react with aq. NaOH. Thus sod. ethoxide (C2H5ONa) is prepared by the reaction of Na metal with ethyl alcohol.
JEE Advanced (Fill in the Blanks): Alcohols, Phenols & Ethers | Chapter-wise Tests for JEE Main & Advanced

The document JEE Advanced (Fill in the Blanks): Alcohols, Phenols & Ethers | Chapter-wise Tests for JEE Main & Advanced is a part of the JEE Course Chapter-wise Tests for JEE Main & Advanced.
All you need of JEE at this link: JEE
446 docs|930 tests
446 docs|930 tests
Download as PDF
Explore Courses for JEE exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Download the FREE EduRev App
Track your progress, build streaks, highlight & save important lessons and more!
Related Searches

Extra Questions

,

mock tests for examination

,

shortcuts and tricks

,

Phenols & Ethers | Chapter-wise Tests for JEE Main & Advanced

,

past year papers

,

study material

,

JEE Advanced (Fill in the Blanks): Alcohols

,

JEE Advanced (Fill in the Blanks): Alcohols

,

Summary

,

Exam

,

Sample Paper

,

Objective type Questions

,

practice quizzes

,

Phenols & Ethers | Chapter-wise Tests for JEE Main & Advanced

,

JEE Advanced (Fill in the Blanks): Alcohols

,

Semester Notes

,

ppt

,

pdf

,

Free

,

Previous Year Questions with Solutions

,

Phenols & Ethers | Chapter-wise Tests for JEE Main & Advanced

,

MCQs

,

Important questions

,

video lectures

,

Viva Questions

;