471. Enzymes are organic catalysts used in the __________ reactions.
Chemical
Biochemical
Photochemical
Electrochemical
✅ The correct answer is option B.
Chemical Process MCQs
472. Vinyl chloride (CH₂ = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of
4 kgf/cm² & 500°C
10 kgf/cm² & 1000°C
40 kg/cm² & 200°C
100 kgi/cm² & 500°C
✅ The correct answer is option A.
473. Which of the following is not a raw material used for the manufacture of ordinary glass?
Iron oxide
Soda ash
Limestone
Silica
✅ The correct answer is option A.
474. The process used for the manufacture of ethyl alcohol from molasses is
Distillation
Dehydration
Dehydrogenation
None of these
✅ The correct answer is option D.
475. Consider the production of ammonia from methene and air as raw materials. The catalyst used are: (i) __________ for steam reforming of methane and (ii) __________ for ammonia synthesis.
(i) – Ni/Al2O₃; (ii) – Cu – ZnO/Al2O₃
(i) – Fe/Al2O₃; (ii) – Cu – ZnO/Al2O₃
(i) – Ni/Al2O₃; (ii) – Fe/Al2O₃
(i) – Fe/Al2O₃; (ii) – Ni/Al2O₃
✅ The correct answer is option C.
476. Sulphuric acid saturated with SO₃ is called
Concentrated H₂SO₄
Sulphurous acid
Oleum
None of these
✅ The correct answer is option C.
477. Setting of plaster of paris is accompanied with
Hydration
Dehydration
Hydrolysis
Loss of CO₂
✅ The correct answer is option A.
478. Which of the following is an organo-metal-lic compound?
Isopropyl alcohol
Tetra-ethyl lead
Zeolite
Cumene
✅ The correct answer is option B.
479. Bordeaux mixture is a/an
Fertiliser
Inorganic fungicide
Insecticide
Explosive
✅ The correct answer is option B.
480. Which allotrope of sulphur is insoluble in carbon disulphide?
Rhombic sulphur
Monoclinic sulphur
Plastic sulphur
Milk of sulphur
✅ The correct answer is option C.