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The p-Block Elements

Multiple Choice Questions

51.

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

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

55.
Buckminster-fullerene is a variety of

boron

carbon

ammonia

fluorine

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.

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

59.

Number of carbon atoms in kerosene is

C_17-20
C_12-16
C_20-25
C_25-30

60.

C¹⁴ is

a natural non-radioactive isotope
an artificial non-radioactive isotope
an artificial radioactive isotope
a natural radioactive isotope

Previous Year Papers

Test Series

Test Yourself

Multiple Choice Questions

55. Buckminster-fullerene is a variety of boron carbon ammonia fluorine

55.
Buckminster-fullerene is a variety of

boron

carbon

ammonia

fluorine