CUET PG Chemistry Previous Paper (2022 Shift-2)

Consider the following statements:

A. The addition of HBr to unsymmetrical alkenes is Markovikov additiion.
B. In the presence of peroxides. Anti-Markovnikov product is formed.
C. $$E_{2}$$ elimation at bridgehead position is easy to occur.
D. $$S_{N}2$$ reaction at vinylic position is difficult to occur.
Choose the correct statements from the options given below:

The major product of the following rearrangement reaction is

The claison condensation of ethyl acetate in the presence of sodium ethoxide delivers

How the following compounds are related to each other?

The stereochemical requirement for $$E_{2}$$ elimination is:

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : In ethylene glycol, skew conformation is more stable than staggered conformation.

Reason R : Staggered conformation is unstable due to steric hindrance.

In the light of the above statement, choose the correct answer from the options given below:

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : Methoxymethyl chloride undergoes hydrolysis more than $$10^{4}$$ times faster than methyl chloride.

Reason R : Methoxymethyl chloride undergoes $$S^{N}1$$ mechanism.
In the light of the above statement, choose the correct answer from the options given below:

Consider the following reactions involving $$S_{n}$$
A. $$Nu^{-} + R - L \rightarrow R - Nu^{+} L:^{-}$$
B. $$Nu + R - L \rightarrow R - Nu^{+} L^{-}$$
C. $$Nu^{-} + R - L \rightarrow R - Nu + L$$

Which of the above reactions will be accelerated upon increasing solvent ionizing power:

Given below are two statements:

Statements I :

is stabilized by resonance
Statements II: Is the above structure, formal charges on C and N are +1 and -1 respectively.

In the light of the above statements, choose the correct answer from the options given below:

Reaction of Z-2 phenyl-2 butene with bromine leads to 63% anti addition and 37% syn addition, while that of Z-2 butene leads to 100% anti addition. This can be explained as:-

A. Formation of an intermediate three membered ring cation- a bromonium ion.
B. Interaction of $$\pi$$-bond of the alkene and diatomic molecule leads to polarization of bromine molecule.
C. Bromonium ion is more stable than the corresponding open carbocation intermediate.
D. Bromonium ion is less stable than the corresponding open carbocation intermediate.