Hard
Soft
Metallic
Lubricating
✅ The correct answer is option B.
Chemical Engineering MCQs
Most commonly used rubber vulcanising agent is
Sulphur
Bromine
Platinum
Alumina
✅ The correct answer is option A.
Iron ore hametite is concentrated using
Electro magnetic separation mainly
Gravity separation
Froth floatation
Roasting
✅ The correct answer is option B.
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
-5 to 0
5 to 10
30 to 50
75 to 80
✅ The correct answer is option C.
Fatty material used in soap making is
Fatty acid
Fatty alcohols
Tallow
Detergents
✅ The correct answer is option C.
Nylon-6 is manufactured from
caprolactum.
adipic acid and hexamethylene diamine.
maleic anhydride and hexamethylene diamine.
sebasic acid and hexamethylene diamine.
✅ The correct answer is option A.
Celluloid is
cellulose acetate
regenerated cellulose
cellulose nitrate
cellulose acetate butyrate
✅ The correct answer is option C.
Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
organic peroxides
sulphuric acid
hydroflouric acid
none of these
✅ The correct answer is option A.
Addition of stabiliser during PVC manufacture is done to
improve its impact strength.
improve its elasticity.
reduce the melt viscosity & glass transition temperature.
prevent its thermal degradation.
✅ The correct answer is option D.
Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called
polyurethane
silicone rubber
teflon
epoxy resin
✅ The correct answer is option C.