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4493. Which of the following polymers belong to the class of formaldehyde resin ?

September 7, 2025 by Admin

Melamine resins

Teflon

Dacron

None of these

✅ The correct answer is option A.

Categories Chemical Engineering, Engineering, Polymer Technology MCQs Tags Chemical Engineering MCQs, Engineering MCQs, Polymer Technology MCQs

4488. The principle applied in liquefaction of gases is

4498. Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg . K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is

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