Question

Which statement does NOT apply to unsaturated hydrocarbons?

Unsaturated hydrocarbons require energy to react.

Unsaturated hydrocarbons are very reactive.

Unsaturated hydrocarbons contain double and triple bonds.

Unsaturated hydrocarbons undergo addition reactions to become saturated.

Answer 1

Unsaturated hydrocarbons undergo addition reactions to become saturated.

Answer 2

Answer: The correct statement is unsaturated hydrocarbons require energy to react.

Step-by-step explanation:

Unsaturated hydrocarbons are defined as the hydrocarbons which have double or triple covalent C-C bonds. They are known as alkenes and alkynes respectively. The general formula for these hydrocarbons is
`C_nH_(2n)` and
`C_nH_(2n-2)`

These hydrocarbons are more reactive than the saturated ones because of the presence of
`\pi-`bonds. These bonds are weaker than
`\sigma-`bonds and thus can be easily broken. Addition reactions is more favorable for the compounds having
`\pi-`bonds.

These hydrocarbons do not require any energy to react. They are readily reactive.

Hence, the correct statement is unsaturated hydrocarbons require energy to react.