Consecutive members of an alkane homogenous series differ by

Explanation

Alkanes are a class of organic compounds consisting of carbon and hydrogen atoms, and they belong to a homologous series. A homologous series is a group of compounds that have the same general formula, similar chemical properties, and show a gradual change in physical properties.

In the case of alkanes, the general formula is C_nH_2n+2. Consecutive members of an alkane homologous series differ by one carbon atom and two hydrogen atoms, which can be represented as CH₂. This is because, as you go down the series, each alkane has one more carbon and two more hydrogen atoms than the previous one.

For example, let's consider three consecutive alkanes: methane (CH₄), ethane (C₂H₆), and propane (C₃H₈). As we move from methane to ethane, we add one carbon atom and two hydrogen atoms (CH₂). The same difference applies when we move from ethane to propane. This pattern continues throughout the alkane series.

Therefore, the correct answer isOption B: CH₂.