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Q.

Regarding phenol-formaldehyde polymer, false statement is(P=phenol, F=formaldehyde)

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a

The intermediate formed in its preparation is ortho and para-hydroxymethyl phenol derivatives

b

PF>1 in Novolac

c

PF<1 in Bakelite

d

Both Novolac and Bakelite are linear copolymers

answer is D.

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Detailed Solution

Novolac is a linear copolymer;

Bakelite is a cross linked copolymer;

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