* Cycloalkanes are cyclic hydrocarbons with the general formula CₙH₂ₙ.
Let's analyze each option:
* C₅H₁₂: This is the formula for pentane, an alkane (not a cycloalkane).
* C₂H₄: This is the formula for ethene, an alkene.
* C₄H₁₀: This is the formula for butane, an alkane.
* C₅H₁₀: This fits the general formula CₙH₂ₙ (where n = 5). This is the formula for cyclopentane.
Therefore, C₅H₁₀ is the possible formula for a cycloalkane.
