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Q.

The number of pi bonds in the repeating unit of polystyrene are ‘X’. The number of pi bonds in the repeating unit of Buna-N are ‘Y’. ‘X’ and ‘Y’ are respectively

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a

4, 1

b

3, 3

c

4, 5

d

3, 4

answer is B.

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Detailed Solution

The repeating unit of polystyrene has 3 pi bonds.

Question Image
Poly styrene

The repeating unit of Buna-N has 3 pi bonds (1 carbon-carbon pi bond and 2 carbon-nitrogen pi bonds, -C≡N ).

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