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CBSE

Subject

Chemistry
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NEET Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Multiple Choice Questions

11.

Which one of the following is most reactive towards electrophilic reagents?



12.

The general molecular formula, which represents the homologous series of alkanols is:

  • CnH2nO2

  • CnH2nO

  • CnH2n+1O

  • CnH2n+1O



13.

In the following the most stable conformation of n-butane is



14.

The number of structural isomers possible from the molecular formula C3H9N is 

  • 4

  • 5

  • 2

  • 2



15.

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

  • oxidation

  • cracking

  • distillation under reduced pressure

  • distillation under reduced pressure



16.

The stability of carbanions in the following

1 right parenthesis space RC space identical to straight C with minus on top straight H
space 2 right parenthesis space straight C subscript 6 straight H subscript 5 to the power of minus
3 right parenthesis space straight R subscript 2 straight C space equals space straight C to the power of minus straight H
4 right parenthesis space straight R subscript 3 straight C space equals space straight C to the power of minus straight H

is in the order of 

  • (1) > (2) > (3) > (4)

  • (2) > (3) > (4) > (1)

  • (4) > (2) > (3)  > (1)

  • (4) > (2) > (3)  > (1)



17.

Which of the following species is not electrophilic in nature? 

  • Cl+

  • BH3

  • H3O+

  • H3O+



18.

The IUPAC name of the compound having the formula CH identical to space straight C minus CH space equals CH subscript 2

  • 3-butene-1-yne

  • 1-butyn-3-ene

  • but-1-yne-3-ene

  • but-1-yne-3-ene



19.

Two possible stereo-structures of CH3CHOH.COOH, which are optically active, are called

  • diastereomers

  • atropisomers

  • enantiomers

  • enantiomers



20.

Which of the following statement is correct for a nucleophile? 

  • Nucleophile is s Lewis acid

  • Ammonia is a nucleophile

  • Nucleophiles attack low electrons density sites

  • Nucleophiles attack low electrons density sites



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