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 Multiple Choice QuestionsMultiple Choice Questions

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11.

In which of the following compounds, the oxidation number of oxygen is +2?

  • OF2

  • Na2O

  • NaO2

  • NaO3


12.

The monomer of natural rubber is

  • Neoprene

  • Isoprene

  • Terylene

  • Orlon


13.

Which compound has the highest boiling point?

  • n-pentane

  • Isopentane

  • Neopentane

  • Isobutane


14.

The number of π-electrons in the molecules of aromatic compound is


  • 4n

  • 4n+1

  • 4n+2

  • 2n+4


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15.

Rutherford's alpha (α) particle scattering experiment resulted into the discovery of

  • proton

  • nucleus in the atom

  • electron

  • atomic mass


16.

Which one of the following is not a heterogeneous mixture?

  • Air

  • Milk

  • Smoke

  • Jelly


17.

Silk farming is known as

  • Epiculture

  • Pisciculture

  • Sericulture

  • Agriculture


18.

Which of the following acids is also a vitamin?

  • Formic acid

  • Ascorbic acid

  • Maleic acid

  • Palmitic acid


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19.

A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify M.

  • Na

  • Mg

  • Cu

  • Ca


20.

One nanometer is equal to

  • 10-7cm

  • 10-8cm

  • 10-6m

  • 10-9m


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