Formula of linolenic acid is `C_(17)H_(29).COOH`. The double bonds occupy the position at

Options

A. `C-9, C-15`
B. `C-12, C-15`
C. `C-9, C-12, C-15`
D. `C-9` only

Answer

To determine the positions of the double bonds in linoleic acid (C₁₇H₂₉COOH), we will follow these steps:

### Step 1: Understand the Structure of Linoleic Acid
Linoleic acid is a polyunsaturated fatty acid. Its molecular formula is C₁₇H₂₉COOH, indicating it has a long hydrocarbon chain with a carboxylic acid group (-COOH) at one end.

### Step 2: Draw the Structure
We can start by drawing the structure of linoleic acid. The carbon chain will consist of 17 carbon atoms, and we will include the carboxylic acid group at one end.

### Step 3: Number the Carbon Atoms
We will number the carbon atoms starting from the carboxylic acid group. This means the carbon in the -COOH group will be carbon 1.

### Step 4: Identify the Double Bonds
In linoleic acid, we need to identify where the double bonds are located. Typically, linoleic acid has two double bonds.

### Step 5: Locate the Positions of the Double Bonds
After drawing the structure and numbering the carbon atoms, we find that the double bonds are located at:
- Carbon 9 (C9)
- Carbon 12 (C12)
- Carbon 15 (C15)

### Final Answer
The double bonds in linoleic acid occupy the positions at C9, C12, and C15.

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