1.

A hydorcarbon molecule contins 4 hydrogen atoms. Give its olecular formula , if it is an : (i) alkane, (ii) alkne ,(iii) alkyne.

Answer» (i) an alkane containing 4 hydrogen atoms in its molecule is methane , `CH_(4)`
(ii) An alkne containing 4 hydrogen atoms in its molecule is ethene , ` C_(2)H_(4)`
(iii) An alyne containing 4 hydrogen atoms in its molecule is propyne, `C_(3)H_(4)`


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