Subject - Chemistry:

Basics

MCQ - 52-2238

Question:

What are the C − C − C bond angles along the polymeric chain in PVC?

They are all 109^o
Half are 109^o
They are all 120^o
Half are 109^o

Correct Answer: A

Explanation:

Chloroethene is an alkene with sp² hybridised carbon molecule at the carbon-carbon double bond. In the polymeric chain of PVC, the carbon atoms are sp³hybridised and thus the four sp³ hybrid orbitals point towards the corners of a tetrahedron in order to minimize repulsion at bond angles of 109^o. Thus all the C–C–C bond angles are 109^o. (ans)

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