NEET

a
b
c
d

Solution

a
b
c
d

Solution

a
b
c
d

Solution

A and B are enantiomers

A mixture of methyl alcohol and acetone can be separated by

distillation
fractional distillation
steam distillation
distillation under reduced pressure

a
b
c
d

Solution

Given structures are representing cis-trans isomerism(geometrical) hence differ only in configuration.

In Kjeldahl’s method, CuSO₄ acts as

oxidising agent
reducing agent
hydrolysing agent
catalytic agent

Solution

Kjeldahl’s method depends upon the fact that most of the organic compounds containing nitrogen are quantitatively decomposed to give (NH₄)₂SO₄ when heated strongly with conc. H₂SO₄. In this method CuSO₄ acts as catalytic agent.

Which is a chiral molecule?

2, 2-dimethylbutanoic acid
4-methylpentanoic acid
3-methylpentanoic acid
3,3-dimethylbutanoic acid

Solution

If a compound has n asymmetric carbon atoms, then maximum number of optical isomers are given by the formula

2ⁿ
\((\frac{1}{2})^{n}\)
\(\sqrt{2n}\)
\(2\sqrt{n}\)

Solution

Maximum number optical isomers of a compound having n assymetric carbon atoms is 2ⁿ.

Isomerism due to rotation around C–C single bond is :

Enantiomerism
Position isomerism
Conformation
Diastereoisomerism

Solution

The free rotation across C – C gives rise to many spatial arrangements. These arrangements are called conformers and property is called conformation.

The best method for the separation of naphthalene and benzoic acid from their mixture is:

distillation
sublimation
chromatography
crystallisation

Solution

Among the given compounds naphthelene is volatile but benzoic acid is non-volatile (it forms a dimer). So,the best method for their separation is sublimation,which is applicable to compounds which can be converted directly into the vapour phase from its solid state on heating and back to the solid state on cooling.Hence it is the most appropriate method.

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