Question

Select alkene and alkyne from the following:
C6H12, C3H4, C2H4, CH4, C4H8, C5H8

Answer 1

CH4 is an alkane.

C2H4, C4H8, C6H12 are alkenes.

C3H4, C5H8 are alkynes.

Explanation:

(i) CH4 is an alkane.

Alkanes have a general formula CnH2n+2. It consists of each carbon bonded to four other atoms through single covalent bonds.  

(ii) C2H4, C4H8, C6H12 are alkenes.

Alkenes have a general formula CnH2n. It consists of a single carbon-carbon double bond.

(iii) C3H4, C5H8 are alkynes.

Alkynes have a general formula CnH2n-2. It consists of a single carbon-carbon triple bond.