Question

which is the next homologue of Ethane​

Answer 1

Answer:

Next homologue of ethane will be Propane as it differs by -CH2 unit from ethane.

Answer 2

Answer:

propane (C₃H₈),                      C₃H₂ₓ₃₊₂

Explanation:

The homologous series of straight-chained alkanes (CₙH₂ₙ₊₂) goes like as follows,

methane (CH₄),                       C₁H₂ₓ₁₊₂

ethane (C₂H₆),                        C₂H₂ₓ₂₊₂

propane (C₃H₈),                      C₃H₂ₓ₃₊₂

butane (C₄H₁₀),                       C₄H₂ₓ₄₊₂

and pentane (C₅H₁₂)               C₅H₂ₓ₅₊₂

In that series, successive members differ in mass by an extra methylene bridge (-CH₂- unit) inserted in the chain