1(xiii)
An unsaturated hydrocarbon with three atoms of carbon and six atoms of hydrogen is:
- (a)propyne
- (b)propane
- (c)propene
- (d)propanol
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propene
Reason — Propene is an alkene with molecular formula C3H6, which contains 3 carbon atoms and 6 hydrogen atoms with a C=C double bond, making it unsaturated. It follows the general formula of alkenes (CnH2n).
CH2=CH-CH3 (propene)
Whereas, propyne (C3H4) has 4 hydrogens, propane (C3H8) is saturated, and propanol (C3H8O) is an alcohol containing oxygen.