1

NEET 2021

MCQ (Single Correct Answer)
What is the IUPAC name of the organic compound formed in the following chemical reaction?

A
2-methylbutan-2-ol
B
2-methylpropan-2-ol
C
pentan-2-ol
D
pentan-3-ol

Explanation


IUPAC name of product is 2-methylbutan-2-ol.
2

NEET 2021

MCQ (Single Correct Answer)
The major product formed in dehydrohalogenation reaction of 2-Bromo pentane is Pent-2-ene. This product formation is based on?
A
Huckel's Rule
B
Saytzeff's Rule
C
Hund's Rule
D
Hofmann Rule

Explanation

Major product formed in dehydrohalogenation reaction of 2-bromopentane is pent-2-ene because according to Saytzeff's Rule, in dehydrohalogenation reactions, the preferred product is that alkene which has greater number of alkyl group(s) attached to the doubly bonded carbon atoms.

3

NEET 2021

MCQ (Single Correct Answer)
The compound which shows metamerism is :
A
C4H10O
B
C5H12
C
C3H8O
D
C3H6O

Explanation

Metamerism compound which have same molecular formula but different number of carbon atoms on either sides of functional group are known as metamers and this phenomenon is known as metamerism.

Compounds with formula C4H10O has ether functional group in which following arrangements are possible. So, it shows metamerism. For example

CH3 - CH2 - O - CH2 - CH3,



and CH3 - O - CH2 - CH2 - CH3 are metamers as structure of alkyl chains are different around the functional group.
4

NEET 2021

MCQ (Single Correct Answer)
The major product of the following chemical reaction is :

A
B
C
D

Explanation

Addition of HBr to an alkene in presence of a peroxide (benzoyl peroxide [(C6H5CO)2O2] gives an antiMarkownikoff’s product. Anti-Markownikoff’s rule states that hydrogen is added to a more substituted carbon atom of an unsymmetrical alkene.

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