Question

Monomer of is : 

• A. 2-methyl propene
• B. Styrene
• C. Propylene
• D. Ethene

Answer 1

The Correct Option is A

To determine the monomer of the given polymer structure, we need to analyze the repeating unit present in the polymer.

The structure shown has a repeating unit with the form:

[-\text{C(CH}_3)_2-\text{CH}_2-]_n

This suggests that the monomer must have a structure that, through polymerization, forms this repeating unit. The structure aligns with the polymerization of an alkene with the formula:

\text{C}_4\text{H}_8, which corresponds to 2-methyl propene.

Explanation for each option:

• 2-methyl propene: This monomer has the structure where one carbon is bonded to three other carbons (a methyl group and a main carbon chain), matching the repeating unit's connectivity. Hence, it is the correct answer.
• Styrene: Styrene has the structure \text{C}_6\text{H}_5\text{CH=CH}_2, which includes a benzene ring. This is not consistent with the given polymer.
• Propylene: Propylene or propene is \text{CH}_3\text{CH=CH}_2, which would not create the branching seen in the depicted polymer.
• Ethene: Ethene or ethylene is \text{CH}_2=\text{CH}_2, a linear molecule without the required methyl branching.

Thus, the monomer of the provided polymer segment is 2-methyl propene.