Which of the following polymers is suitable for packaging and electrical insulation?
A. polyamide B. polyethene C. polycarbonate D. polystyrene Correct Answer: Option D – polystyrene
The most important use of hydrogen is in the?
A. manufacture of ammonia B. manufacture of methyl alcohol C. manufacture of ethyl alcohol D. hydrogenation of oils Correct Answer: Option A – manufacture of ammonia
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into?
A. CH3CH2CH2CH3 B. CH2 = CH – CH2CH3 C. CH3CH2 – C = CH D. CH3 – C = C – CH3 Correct Answer: Option C – CH3CH2 – C = CH
Ordinary glass is manufactured from silica; CaCO3 and ________?
A. Na2CO3 B. K2CO3 C. K2SO4 D. NaHCO3 Correct Answer: Option A – Na2CO3
Which of these pairs are synthetic and natural macromolecules respectively?
A. Haemoglobin and nylon, creatine and polyethylene B. Nylon and polyethlene, creatine and Haemoglobin C. Nylon and creatine, polyethylene and haemoglobin D. Polyethylene and creatine, nylon and haemoglobin Correct Answer: Option C – Nylon and creatine,...Products
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