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Question

Bakelite (C6H6O-CH2OH)n is obtained from phenol by reacting with


A

(CH2OH)2

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B

CH3CHO

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C

CH3COCH3

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D

HCHO

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Solution

The correct option is D

HCHO


The explanation for the correct option:

(D) HCHO

  • Phenol and formaldehyde are the monomers used to create the polymer known as bakelite. This thermosetting polymer is a phenol-formaldehyde resin.
  • The polymer generated via the polymerization of phenol and formaldehyde is known commercially as bakelite.
  • These are among the oldest synthetic polymers produced by humans.
  • Formaldehyde is made to react with phenol.
  • The reactants phenol and formaldehyde react in an acidic or basic medium to form ortho and para hydroxymethyl phenols. Therefore, formaldehyde is the correct option.
  • The preparation of bakelite:

The explanation for the incorrect option:

(A) (CH2OH)2

  • Ethylene glycol cannot be used to prepare bakelite. So, this is an incorrect option.

(B) CH3CHO

  • Acetaldehyde cannot be used to prepare bakelite. So, this is an incorrect option.

(C) CH3COCH3

  • Acetone cannot be used to prepare bakelite. So, this is an incorrect option.

Hence, the correct option is (D) HCHO.


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