11. Starting raw material for the manufacture of alum is
Alumina
Gypsum
Bauxite
Ammonium bicarbonate
✅ The correct answer is option C.
Chemical Process MCQs
12. SO₂ is bubbled through hot sugar cane juice to
Act as an acidifying agent
Increase its concentration
Increase the amount of molasses
Increase the crystal size
✅ The correct answer is option A.
13. Diaphragm electrolytic cell as compared to mercury electrolytic cell
Produces 70% NaOH solution
Requires less specific power consumption for the production of chlorine
Requires lesser investment for similar capacity
All of the above
✅ The correct answer is option C.
14. Cement mainly contains
CaO, SiO₂, Al2O₃
MgO, SiO₂, K₂O
Al2O₃, MgO, FE₂O₃
CaO, MgO, K₂O
✅ The correct answer is option A.
15. Cumene is the starting material for the production of
Benzoic acid
Phenol and acetone
Isoprene
Styrene
✅ The correct answer is option B.
16. Chemical name of aspirin (an analgesic drug) is
Acetylsalicylic acid
Nictonic acid
Calcium acetate
Methyl salicylate
✅ The correct answer is option A.
17. The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.
800
1600
4000
8500
✅ The correct answer is option B.
18. What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell?
Cl₂ & Na
Cl₂ & H₂
O₂ & H₂
Cl₂, H₂ & NaOH solution
✅ The correct answer is option D.
19. Insulin is an __________ drug.
Anti-malarial
Anti-TB
Antibiotic
None of these
✅ The correct answer is option D.
20. Polymethyl methacrylate (PMMA) is known as
Bakelite
Teflon
Perspex
Nylon-6
✅ The correct answer is option C.