Question:
Identify the monomers used in preparation of Novolac.
Identify the monomers used in preparation of Novolac.
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Novolac is produced by condensation polymerization of phenol with formaldehyde in acidic medium.
Updated On: Feb 18, 2026
- Phenol and Ethanol
- Urea and Phenol
- Phenol and Methanal
- Urea and Methanal
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The Correct Option is C
Solution and Explanation
Step 1: Understand Novolac polymer.
Novolac is a phenol-formaldehyde resin formed under acidic conditions with excess phenol.
Step 2: Identify the monomers involved.
The two monomers required are phenol and methanal (formaldehyde). Their condensation leads to the formation of Novolac resin.
Step 3: Eliminate incorrect options.
Options involving ethanol or urea are incorrect, as they do not form phenol-formaldehyde resins.
Step 4: Conclusion.
Thus, the correct monomers used in the preparation of Novolac are phenol and methanal.
Novolac is a phenol-formaldehyde resin formed under acidic conditions with excess phenol.
Step 2: Identify the monomers involved.
The two monomers required are phenol and methanal (formaldehyde). Their condensation leads to the formation of Novolac resin.
Step 3: Eliminate incorrect options.
Options involving ethanol or urea are incorrect, as they do not form phenol-formaldehyde resins.
Step 4: Conclusion.
Thus, the correct monomers used in the preparation of Novolac are phenol and methanal.
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