Question

(a) Give the names and structural formulae of the next two higher homologues of methane.
(b) The molecular formula of a hydrocarbon is C10H18. Name its homologous series.
(c) Select the hydrocarbons which are members of the same homologous series. Give the name of each series.
C5H10; C3H8; C6H10; C4H10; C7H12; C8H16

Answer 1

Answer:

Explanation:

Next two higher homologues of methane : C2H6 Ethane

C3H8 propane

homologous series of C10H18 is alkynes

1 . C5H10 & C8H16

2. C3H8 & C4H10

3. C6H10 & C7H12

Answer 2

Ethane and Propane Comes after Methane

Explanation:

a.) Ethane ($C_2H_6$) and Propane ($C_3H_8$) are the names of the successive homologous series of Methane.

Their Structure formula's have been shown in the attached figure-

b.) 'A' belongs to alkyne as general formula of alkyne is $C_2_nH_2_n_-_2$.

'B' belongs to alkene as general formula of alkene is $C_nH_2_n$.

c.) 1.)$C_H_8\ and\ C_4H_1_0$ are hydrocarbons belonging to the homologous series of Alkanes.

2.) $C_5H_1_0\ and\ C_8H_1_6$are hydrocarbons belonging to the homologous series of Alkenes.

3.) $C_6H_1_0\ and\ C_7H_1_2$ are hydrocarbons belonging to the homologous series of Alkynes.