61.

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

• chromatography

• crystallisation

• distillation

• sublimation

R - NH - COH $\underset{\mathrm{Pyridine}}{\overset{{\mathrm{POCl}}_3}{\to }}$ Product

In the given reaction, what will be the product?

• R - N = C = O

• R - $\stackrel{+}{\mathrm{N}}$ $\equiv$ C^-

• R - C $\equiv$ N

• None of these

Which of the following will show geometrical isomerism?

• but-1-ene

• but-2-ene

• 2, 3-dichlorobutane

• ethene

The correct statement(s) about the compound is/are

• The total number of stereoisomes possible for X is 6

• The total number of diastereomers possible for X is 3

• If the stereo chemistry about the double bond is X is trans, the number of enantiomers

• If the stereo chemistry about the double bond in x is, the numberof enantiomers possible to X is 3.

What will be the IUPAC name of given compound?

• 2, 5-diethyl-4-methylhexane

• 3, 4, 6-trimethyloctane

• 2, 5, 6-trimethyloctane

• 3, 5-dimethyl-6-ethylheptane

A mixture of camphor and benzoic acid can be separated by :

• chemical method

• sublimation

• fractional distillation

• extraction with a solvent

Which one of the following contain isopropyl group?

• 2, 2, 3, 3-tetramethylpentane

• 2-methylpentane

• 2, 2, 3-trimethylpentane

• 3, 3-dimethylpentane

The IUPAC name of the compound is:

• 1-ethyl-3, 3-dimethyl cyclochexane

• 3-ethyl-1, 1-dimethyl cyclohexane

• 3-ethyl-5-methyl heptane

• 5-sec-Butyl-4 isopropydecane

The number of chiral carbons atoms present in the molecule is:

• 3

• 4

• 2

• 1

Which of the following statement(s) is /are false about cyclopropane -1, 2 dicarboxylic acid?

• It has two geometrical isomers

• It has three stereoisomers

• All the stereo isomers are optically active

• Only tran isomers show enantio- isomorphism