251. Which of the following coals has the highest calorific value?
Lignite
Sub-bituminous
Anthracite
Peat
✅ The correct answer is option C.
Chemical Process MCQs
252. Calcareous & argillaceous materials are used in the manufacture of
Lead
Cement
Carbon disulphide
None of these
✅ The correct answer is option B.
253. Bleaching of paper pulp is done with
Activated clay
Bromine
Chlorine or chlorine dioxide
Magnesium sulphite
✅ The correct answer is option C.
254. Which of the following is not required in the manufacture of soda ash by Solvay process?
Ammonia
Limestone
Nitric acid
None of these
✅ The correct answer is option C.
255. CaCl(OCl) is the chemical formula of
Hypo
Bleaching powder
Plaster of paris
Aqua regia
✅ The correct answer is option B.
256. Commercially ethylene is produced from naphtha by
Catalytic cracking
Catalytic dehydrogenation
Pyrolysis
Hydrocracking
✅ The correct answer is option D.
257. Polythene is a/an __________ polymerisation product.
Addition
Condensation
Thermosetting
None of these
✅ The correct answer is option A.
258. An oil is converted into fat by its
Hydrogenation
Hydrolysis
Hydrocracking
Hydration
✅ The correct answer is option A.
259. In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
Sodium sulphide & sodium carbonate
Sodium sulphite & sodium carbonate
Sodium sulphite & sodium sulphide
None of these
✅ The correct answer is option A.
260. Which of the following is the purest form of water out of the following ?
Underground water
Rain water
Well water
Lake water
✅ The correct answer is option B.