Q7 of 37 Page 4

A hydrocarbon molecule contains 4 hydrogen atoms. Give its molecular formula, if it is an: (i) alkane, (ii) alkene (iii) alkyne.

(i) An alkane containing 4 hydrogen atoms in its molecule is methane, CH4.
(ii) An alkene containing 4 hydrogen atoms in its molecule is ethane, C2H4
(iii) An alkyne containing 4 hydrogen atoms in its molecule is propyne, C3H4.

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