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Which of the following is produced by Novalak – acid system?(a) Ketone(b) Carboxylic acid(c) Ester(d) AldehydeThe question was asked in an interview.This interesting question is from Comparative Properties of Gas-Vapour Cured Resin Binders in portion Binder Technology of Casting-Forming-Welding II

Answer»

The correct option is (d) Aldehyde

Easy explanation: The novalak – ACID system PRODUCES formaldehyde, which by the name suggests is an aldehyde and methanol while PRODUCTION of CORES.



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