Verified Answer :

olemakpadu

The only saturated hydrocarbons are Alkanes:   \(C_{n} H_{2n+2}\)

From that we can see that:
CH4, C3H8 and C4H10
are saturated.

Therefore:
C2H4   is unsaturated.   Answer is (2).

Answer: (2) \(C_2H_4\)

Explanation: Unsaturated organic compounds are those compounds which contains carbon-carbon double or triple bond.

Saturated organic compounds are those compounds which contains carbon-carbon single bond.

\(CH_4\), \(C_3H_8\) and \(C_4H_10\) are all alkanes having general formula \(C_nH_{2n+2}\) containing single bonds.

\(C_2H_4\) is an alkene having general formula \(C_nH_{2n}\) containing double bonds.

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