Question

A hydrocarbon X undergoes the reaction under suitable conditions as shown below:

\[\begin{array}{cc}
\ce{\phantom{.....}H\phantom{....}H\phantom{....}H\phantom{....}H\phantom{.............}H\phantom{.......}H\phantom{....}H\phantom{...................}H\phantom{.....}}\\
\phantom{.....}|\phantom{......}|\phantom{......}|\phantom{......}|\phantom{...............}\backslash\phantom{.......}|\phantom{.....}|\phantom{.....................}|\phantom{.....}\\
\ce{H - C - C - C - C - H -> C = C - C - H +  H - C - H}\\
\phantom{......}|\phantom{......}|\phantom{......}|\phantom{......}|\phantom{...............}/\phantom{.............}|\phantom{.....................}|\phantom{......}\\
\ce{\underset{\phantom{........}(X)}{\phantom{......}H\phantom{....}H\phantom{....}H\phantom{....}H}\underset{\phantom{.................}(Y)}{\phantom{............}H\phantom{..............}H}\phantom{...................}\underset{(Z)}{H}\phantom{......}}
\end{array}\]

Which compound(s) is/are unsaturated?

विकल्प

• X only

• Y only

• X and Z

• Y and Z

Answer 1

Y only

Explanation:

An unsaturated hydrocarbon contains at least one double bond (C = C) or triple bond (C ≡ C) (they undergo addition reactions) between carbon atoms.

• Compound Y is unsaturated because it has a double bond (C = C). 
• Compounds X and Z are saturated because they contain only single bonds (C − C).