Q2 of 60 Page 28

A molecule of ammonia (NH3) has

A molecule of ammonia (NH3) has only single bonds. Since the valency of nitrogen is 3, one atom of nitrogen combines with three atoms of hydrogen in a molecule of ammonia. An atom of nitrogen can form three covalent bonds.

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1

Carbon exists in the atmosphere in the form of

 3

Which of the following statements are usually correct for carbon compounds? These

(i) are good conductors of electricity


(ii) are poor conductors of electricity


(iii) have strong forces of attraction between their molecules


(iv) do not have strong forces of attraction between their molecules

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Buckminsterfullerene is an allotropic form of

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Which of the following are correct structural isomers of butane?