Which formula represents Ethene?

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Multiple Choice

Which formula represents Ethene?

Explanation:
Ethene is an unsaturated hydrocarbon with a carbon–carbon double bond. For alkenes, the general pattern is CnH2n, and with two carbons that gives C2H4. Structurewise, each carbon forms two C–H bonds and a C=C double bond between the two carbons, giving a total of four hydrogens. That’s why C2H4 is the correct formula. The other options don’t fit ethene: C2H6 would be ethane, a fully saturated alkane with single bonds; CH4 is methane, a single-carbon molecule; C3H6 would correspond to a three-carbon hydrocarbon such as propene, not ethene.

Ethene is an unsaturated hydrocarbon with a carbon–carbon double bond. For alkenes, the general pattern is CnH2n, and with two carbons that gives C2H4. Structurewise, each carbon forms two C–H bonds and a C=C double bond between the two carbons, giving a total of four hydrogens.

That’s why C2H4 is the correct formula. The other options don’t fit ethene: C2H6 would be ethane, a fully saturated alkane with single bonds; CH4 is methane, a single-carbon molecule; C3H6 would correspond to a three-carbon hydrocarbon such as propene, not ethene.

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