Question

Monomer which is used to make Poly Vinyl Chloride (PVC) is called

• A. chloroethene
• B. chloromethane
• C. chloropropane
• D. chlorobutane

Hint:

PVC is formed from vinyl chloride: \[ CH_2=CHCl \] whose IUPAC name is chloroethene.

Answer 1

The Correct Option is A

Concept:
PVC stands for Poly Vinyl Chloride. It is an addition polymer formed by repeated joining of vinyl chloride monomers. Vinyl chloride is also called chloroethene. Its structure is: \[ CH_2=CHCl \]

Step 1: Identify the polymer name.
Poly Vinyl Chloride means polymer of vinyl chloride. So monomer is: \[ \text{Vinyl chloride} \]

Step 2: Write IUPAC name of vinyl chloride.
Vinyl chloride has two carbon atoms with one double bond and one chlorine atom: \[ CH_2=CHCl \] Its IUPAC name is: \[ \text{chloroethene} \]

Step 3: Polymerization reaction.
\[ nCH_2=CHCl \rightarrow [-CH_2-CHCl-]_n \] The product is: \[ PVC \]

Step 4: Check the options.
Option (A) chloroethene is correct.
Option (B) chloromethane has only one carbon and cannot form PVC.
Option (C) chloropropane is not the monomer of PVC.
Option (D) chlorobutane is not the monomer of PVC. Hence, the correct answer is: \[ \boxed{(A)\ \text{chloroethene}} \]