Question

(a) What is the general formula of alkenes? Identify the alkenes from the following
C2H6, C2H4, C3H4, C2H2, C3H6
(b) Which of the following can give addition reactions?
C2H6, C3H8, C3H6, C2H2, CH4
​Give reason for your choice.

Answer 1

Only Unsaturated Hydrocarbons undergo Addition Reactions

Explanation:

a.) General Formula of Alkenes is $C_nH_2_n$.

From the given compounds-

$C_2H_4\ and\ C_3H_6$ are Alkenes as they contain a single Carbon-Carbon Double Bond.

b.) As we know that, hydrocarbons that undergo addition reactions are Unsaturated.

So from the given compounds-

$C_3H_6\ and\ C_2H_2$ undergo Addition reactions.