Buckminster-fullerene is a variety of from Chemistry The p-Block

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 Multiple Choice QuestionsMultiple Choice Questions

51.

In which of the following the inert pair effect is most prominent?

  • C

  • Si

  • Ge

  • Pb


52.

The metal that does not give the borax bead test is

  • Chromium

  • nickel

  • lead

  • manganese


53.

Which one of the following is a good conductor of electricity?

  • Diamond

  • Graphite

  • Silicon

  • Amorphous carbon


54.

Which one of the following is maximum electronegative?

  • lead

  • Silicon

  • Carbon

  • Tin


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55.

Buckminster-fullerene is a variety of

  • boron

  • carbon

  • ammonia

  • fluorine


B.

carbon

A recently discovered family of carbon allotropes is buckminster fullerene which was named after R, buckminsterfuller. The most common fullerene has the formula C60 and contains hexagonal and pentagonal rings of carbon atoms.


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56.

Doping of silicon with boron leads to

  • n-type semiconductor

  • p-type semiconductor

  • superconductor

  • insulator


57.

The substance not likely to contain CaCO3 is

  • marble statue

  • calcined gypsum

  • sea shells

  • dolomite


58.

The electronic configuration of an element C is 1s2, 2s2, 2p6. The formula of substance containing only C will be

  • C8

  • C4

  • C2

  • C


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59.

Number of carbon atoms in kerosene is

  • C17-20

  • C12-16

  • C20-25

  • C25-30


60.

C14 is

  • a natural non-radioactive isotope

  • an artificial non-radioactive isotope

  • an artificial radioactive isotope

  • a natural radioactive isotope


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