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MCQs

Total Questions : 3103 | Page 30 of 311 pages
Question 291. Brackish water which contains mostly dissolved salt, can be purified by the __________ process.
  1.    Reverse osmosis
  2.    Sand filter
  3.    Lime soda
  4.    Permutit
 Discuss Question
Answer: Option A. -> Reverse osmosis
Question 292. Stereospecific agents are exemplified by
  1.    Radiation
  2.    Supported metal oxide catalysts
  3.    Ziegler catalysts
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 293. High purity nitrogen is used in
  1.    Making protective gas (95% N₂ + 5% H₂) for annealing of cold rolled steel strip coils
  2.    Fire fighting purposes
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 294. Which of the following impurities in feed water for high pressure boiler is the most detrimental?
  1.    Silica
  2.    Dissolved oxygen
  3.    Suspended salt
  4.    Dissolved salt
 Discuss Question
Answer: Option A. -> Silica
Question 295. Essential oils are usually obtained using
  1.    Steam distillation
  2.    Extractive distillation
  3.    Solvent extraction
  4.    Leaching
 Discuss Question
Answer: Option D. -> Leaching
Question 296. Sulphur addition in soap is done to
  1.    Improve the soap texture
  2.    Cure pimples & dandruff
  3.    Fasten lather formation
  4.    Increase its cleansing action
 Discuss Question
Answer: Option B. -> Cure pimples & dandruff
Question 297. Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
  1.    SO₃
  2.    Cl₂
  3.    NH₃
  4.    SO₂
 Discuss Question
Answer: Option B. -> Cl₂
Question 298. Roasting of metallurgical ores is done mainly to
  1.    Dehydrate it
  2.    Sinter the ore
  3.    Remove CO₂ & H₂O
  4.    Remove arsenic & sulphur
 Discuss Question
Answer: Option D. -> Remove arsenic & sulphur
Question 299. Lurgi coal gasifier is a pressurised __________ bed reactor.
  1.    Moving
  2.    Fixed
  3.    Fluidised
  4.    Entrained
 Discuss Question
Answer: Option A. -> Moving
Question 300. Manufacture of phthalic anhydride uses __________ as a catalyst.
  1.    Ni
  2.    Cr
  3.    V₂O₅
  4.    Al₂O₃
 Discuss Question
Answer: Option C. -> V₂O₅

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