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Question

[−CH2−CH∣OH−CH2−CH∣OH−CH2−CH∣OH−]n
Polyvinyl alcohol (as shown above) is a unique polymer having high affinity for water. Which of the following procedures would be most suitable for its preparation?

A
radical chain polymerisation of CH2=CHCH2OH
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B
radical chain polymerisation of CH2=CHOH
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C
radical chain polymerisation of CH2=CHCO2CH3, following by base catalysed hydrolysis
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D
radical chain polymerisation of CH2=CHOCOCH3, followed by acid catalysed hydrolysis
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E
radical chain polymerisation of CH2=CHOCOCH3, followed by base catalysed hydrolysis
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Solution

The correct option is A radical chain polymerisation of CH2=CHOH
[CH2CHOHCH2CHOHCH2CHOH]n

Polyvinyl alcohol is prepared by radical chain polymerisation of CH2=CHOCOCH3, followed by base catalysed hydrolysis in which acetate group is replaced by hydroxide group.

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