Important Questions of Organic Chemistry – Some Basic Principles and Techniques Chemistry | Zigya

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621.

What is the correct IUPAC name of

  • 4-methoxy-2-nitrobenzaldehyde

  • 4-formyl-3-nitroanisole

  • 4-methoxy-6-nitrobenzaldehyde

  • 2-formyl-5-methoxynitrobenzene


622.

In Kjeldahl's method of estimation of nitrogen, CuSO4 act as

  • oxidising agent

  • reducing agent

  • catalytic agent

  • hydrolysis agent


623.

The above pair is known as

  • structural isomers

  • geometrical isomers

  • erythro steroisomers

  • threo stereoisomers


624.

Which of the following compounds can exhibit both geometrical isomerism and enantiomerism?

  • CH3CH2CCH3=CH—COOH

  • CH3—CHOH—COOH

  • CH3—CH=CH—CH3

  • CH3CH2—CHCH3—HC=CH—CH3


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625.

Which pair does not represent the cyclic compound of the molecular formula C4H6?


626.

What will be the decreasing order of stability of following carbocations?

          

  • V >IV >III >II >I

  • I > II> III >IV >V

  • II >V > IV> I> II

  • I> II> III >V> IV


627.

In the following compound, groups designated as A, B, C will be numbered as

  • 3, 2, 1

  • 6, 1, 2

  • 3, 1, 2

  • 1, 2, 3


628.

The following compound can exhibit

  • geometrical isomerism

  • geometrical and optical isomerism

  • optical isomerism

  • tautomerism


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629.

The IUPAC name for

CH3CH=CHCH2C(NH2)H-CH2-COOH

  • 5-amino-2-heptenoic acid

  • 5-amino hex-2-ene-carboxylic aod

  • 3-amino-5-heptenoic acid

  • β-amino-δ-heptenoic acid


630.

Which is not an electrophile?

  • C+H5

  • C+H3

  • BF3

  • SO3


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