An unsaturated hydrocarbon with three atoms of carbon and six atoms of hydrogen is:

ICSE Class 10 Chemistry PYQ · 2026 Paper · Section A

1(xiii)1 Mark · 2026 · Section A · 2026 Paper

An unsaturated hydrocarbon with three atoms of carbon and six atoms of hydrogen is:

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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.

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