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 Multiple Choice QuestionsMultiple Choice Questions

61.

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

  • chromatography

  • crystallisation

  • distillation

  • sublimation


62.

R - NH - COH PyridinePOCl3 Product

In the given reaction, what will be the product?

  • R - N = C = O

  • R - N+  C-

  • R - C  N

  • None of these


63.

Which of the following will show geometrical isomerism?

  • but-1-ene

  • but-2-ene

  • 2, 3-dichlorobutane

  • ethene


64.

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.


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65.

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


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66.

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

  • chemical method

  • sublimation

  • fractional distillation

  • extraction with a solvent


A.

chemical method

Aqueous solution of NaHCO3 is used to separate benzoic acid from its mixture with camphor. Benzoic acid form water soluble sodium benzoate with NaHCO3.


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67.

Which one of the following contain isopropyl group?

  • 2, 2, 3, 3-tetramethylpentane

  • 2-methylpentane

  • 2, 2, 3-trimethylpentane

  • 3, 3-dimethylpentane


68.

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


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69.

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

  • 3

  • 4

  • 2

  • 1


70.

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


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