Which of the following molecules is least resonance stabilized?

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Presence of nitrogen in which among the following compounds can not be detected by Lassaigne method?

  • Hydrazine

  • Aniline

  • p-toluidine

  • Picric acid


2.

The hottest region of Bunsen flame shown in the figure below is:


  • region 2

  • region 3

  • region 4

  • region 4

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3.

The distillation technique most suited for separating glycerol from spent-lye in the soap industry is:

  • fractional distillation

  • steam distillation

  • distillation under reduced pressure

  • distillation under reduced pressure

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4.

For which of the following molecule significant μ≠ 0?

  • only a

  • a and b

  • Only c

  • Only c

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5.

Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?

  • Tertiary butyl chloride

  • Neopentane

  • Isohexane

  • Isohexane

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6.

Identify the compound that exhibits tautomerism

  • 2-Butene

  • Lactic acid

  • 2-Pentanone

  • 2-Pentanone

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7.

Which of the following molecules is least resonance stabilized?


D.

is non-aromatic and hence least reasonance stabilized.
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8.

The IUPAC name of neopentane is

  • 2-methylbutane

  • 2, 2-dimethylpropane

  • 2-methylpropane

  • 2-methylpropane

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9.

The electrophile, E attacks the benzene ring to generate the intermediate σ-complex. Of the following, which σ-complex is of lowest energy? 

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10.

Which one of the following is the correct statement?

  • Boric acid is a protonic acid

  • Beryllium exhibits coordination number of six

  • Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase

  • Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase

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