Question

which of the following molecules possess both single and double bond;
options a)nitrogen b)ethene c)oxygen d)ethyne

Answer 1

The structures are as follows:

a) Nitrogen

Nitrogen exists as N2.
There is triple bond here.
Structure: N Ξ Ν

b) Ethene

Structure: H - C = C - H

There is single bond between each H and C

There is double bond between two C atoms.

c) Oxygen

Oxygen exists as O2 molecule.
Structure: O=O

There is double bond.

d) Ethyne

Structure: H - C Ξ C - H

There is single bond between each H and C. There is triple bond between two C atoms.

Thus, your answer is

B) Ethene

Ethene contains both single bond and double bond.

Answer 2

b ethene is answer of following molecules