My dear carbon - 1

Which of the following is not made of carbon?

• Food

• Jewellery

• Chalk

• Pencil

Carbon exists in the atmosphere in the form of

• Carbon monoxide only

• Carbon monoxide in traces and carbon dioxide

• Carbon dioxide only

• Coal

Which of the following is true for carbon compounds

• Are good conductors of electricity

• Are poor conductors of electricity

• Do not have strong forces of attraction between their molecules

• Forms anions and cations

A molecule of ammonia has

• Only single bonds

• Only double bonds

• Only triple bonds

• Two double bonds and one single bond

Carbon forms four covalent bonds by sharing its four valence

electrons with four univalent atoms, e.g. hydrogen. After the

formation of four bonds, carbon attains the electronic

configuration of

• Helium

• Neon

• Argon

• Krypton

Buckminsterfullerene is an allotropic form of

• Phosphorus

• Sulphur

• Carbon

• Tin

The combining capacity of an element is called

• Bonding

• Covalency

• Valency

• None of the above

Noble gas configuration is attained

• Completely filled innermost shell

• Half filled innermost shell

• Half filled outermost shell

• Completely filled outermost shell

Melting and boiling points of carbon compounds are

• Lower than that of ionic compounds

• Higher than that of ionic compounds

• Equal as that of ionic compounds

• Constant

Valency of carbon is

• 6

• 4

• 2

• 0