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MCQs

Total Questions : 3103 | Page 310 of 311 pages
Question 3091. Deaeration of water in its treatment is necessary, as it___________________?
  1.    Minimises its turbidity
  2.    Helps in controlling its taste and odour
  3.    Minimises its corrosiveness
  4.    None of these
 Discuss Question
Answer: Option C. -> Minimises its corrosiveness
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3092. Glycerine can be obtained from ________________ ?
  1.    Fat
  2.    Naphthalene
  3.    Cumene
  4.    Sucrose
 Discuss Question
Answer: Option A. -> Fat
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3093. Permanent hardness of water is due to the presence of calcium & magnesium __________________?
  1.    Bi-carbonates
  2.    Sulphates & chlorides
  3.    Carbonate
  4.    None of these
 Discuss Question
Answer: Option B. -> Sulphates & chlorides
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3094. Sucrose content in cane sugar may be around ______________________ percent ?
  1.    50
  2.    70
  3.    95
  4.    80
 Discuss Question
Answer: Option C. -> 95
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3095. Which of the following is not produced on commercial scale from sea water ?
  1.    Bromine
  2.    Magnesium compounds
  3.    Potassium compounds
  4.    Sodium sulphate
 Discuss Question
Answer: Option D. -> Sodium sulphate
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3096. Parathion and Malathion are _____________________?
  1.    Pesticides
  2.    Plasticisers for unsaturated polyesters
  3.    Pain-relieving drugs (analgesic)
  4.    Tranquilisers
 Discuss Question
Answer: Option A. -> Pesticides
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3097. Grignard reagent is chemically known as ____________________?
  1.    Ethyl magnesium chloride
  2.    Methyl magnesium chloride
  3.    Dichlorophenol
  4.    Monochloroacetic acid
 Discuss Question
Answer: Option A. -> Ethyl magnesium chloride
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3098. Use of hydrated lime in water treatment_________________?
  1.    Before filtration, reduces the bacterial load on filters
  2.    After filtration, combats the corrosiveness of water due to the presence of O2 & CO2
  3.    Is to adjust the pH value
  4.    All A , B. and C.
 Discuss Question
Answer: Option D. -> All A , B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3099. Raw materials required for the manufacture of __________________ is acetylene and hydrochloric acid?
  1.    Phthalic anhydride
  2.    Vinyl chloride
  3.    Maleic anhydride
  4.    Dacron
 Discuss Question
Answer: Option B. -> Vinyl chloride
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3100. Pick out the wrong statement?
  1.    Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action
  2.    Soap powder is prepared by mixing soap with hydrated sodium carbonate
  3.    Detergents differ from soaps in their action in hard water
  4.    Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc
 Discuss Question
Answer: Option D. -> Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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