Question

write the molecular formula of the 2 and 3 member of the homologous series whose first member is methane

Answer 1

1st Member = Methane $\sf{(CH_4)}$

2nd Member = Ethane $\sf{(C_2H_6)}$

3rd Member = Propane $\sf{(C_3H_8)}$

$<b>These compounds belongs to Alkane family.</b>$

General formula = $\sf{C_n{H}_{2n + 2}}$

Answer 2

$\huge\mathfrak\underline{Answer:}$

Homologous Series of Alkane with General Formula $\sf{C_n H_2n+2}$

$\sf{2nd Member}$$\rightarrow$ $\sf{Ethane}$ $\sf{C_2 H_6}$

$\sf{3rd Member}$$\rightarrow$ $\sf{Propane}$$\sf{C_3 H_8}$