Identify the substances which are underlined:
`ul("Organic compounds")` also called as Olefins.

Explanation

To identify the substances referred to as "organic compounds" that are also called olefins, we can follow these steps:

### Step 1: Understand the term "olefins"
Olefins are a class of organic compounds that are characterized by the presence of at least one double bond between carbon atoms.

**Hint:** Remember that olefins are unsaturated hydrocarbons.

### Step 2: Recognize the general formula of olefins
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