Test: MCQs (One or More Correct Option): Alcohols, Phenols & Ethers | JEE Advanced


7 Questions MCQ Test Class 12 Chemistry 35 Years JEE Mains &Advance Past yr Paper | Test: MCQs (One or More Correct Option): Alcohols, Phenols & Ethers | JEE Advanced


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*Multiple options can be correct
QUESTION: 1

The reaction of    with HBr gives (1998 - 2 Marks)

Solution:

The mechanism of this reaction is represented as follows.

   

*Multiple options can be correct
QUESTION: 2

The ether   when treated with HI produces (1999 - 3 Marks)

Solution:

TIPS/Formulae :
The aromatic ethers are cleaved to give phenol as one of the products.

*Multiple options can be correct
QUESTION: 3

In the reaction   the intermediate (s) is (are)               (2010)

Solution:

Product of reaction of phenol with NaOH/Br2 is sodium salt of 2,4,6-tribromophenol. Hence, species (I), (II), (III) are formed as intermediate.

*Multiple options can be correct
QUESTION: 4

The major product(s) of the following reaction is(are)             (JEE Adv. 2013)

Solution:

 

 

*Multiple options can be correct
QUESTION: 5

The correct combination of names for isomeric alcohols with molecular formula C4H10O is/are (JEE Adv. 2014)

Solution:

Isomeric alcohols with molecular formula C4H10O

*Multiple options can be correct
QUESTION: 6

The reactivity of compound Z with different halogens under appropriate conditions is given below: (JEE Adv. 2014)

The observed pattern of electrophilic substitution can be explained by

Solution:

—OH group is strongly activating and o, p-directing due to +M effect. Thus positions a, b and c are the sites for attack by an electrophile. However, sites b and c are not preferred by bulky electrophile due to steric crowding. Thus more bulky electrophile (like I2) can attack only site a, which is least sterically hindered, a bit smaller electrophile (Br2) can attack at sites a and also b (relatively less sterically hindered site) and the smallest electrophile (Cl2) can attack all the three sites, viz., a, b and c (most sterically hindered site).

*Multiple options can be correct
QUESTION: 7

The major product U in the following reactions is

Solution: