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MCQs

Total Questions : 3103 | Page 9 of 311 pages
Question 81. Starting material for the commercial production of ethyl alcohol in India is
  1.    Rice
  2.    Molasses
  3.    Fruit of Mahua tree
  4.    Maize
 Discuss Question
Answer: Option B. -> Molasses
Question 82. Main use of liquid nitrogen is in
  1.    Rocket propulsion
  2.    Making gun powder
  3.    Detergent manufacture
  4.    Refrigerative cooling
 Discuss Question
Answer: Option D. -> Refrigerative cooling
Question 83. Oxidation of SO₂ to SO₃ is favoured by
  1.    Low temperature and low pressure
  2.    Low temperature and high pressure
  3.    High temperature and low pressure
  4.    High temperature and high pressure
 Discuss Question
Answer: Option B. -> Low temperature and high pressure
Question 84. Na₂CO₃ is called
  1.    Washing soda
  2.    Soda ash
  3.    Plaster of paris
  4.    Calcite
 Discuss Question
Answer: Option B. -> Soda ash
Question 85. Pick out the wrong statement.
  1.    Dry process is used for the manufacture of cement, when the raw material is blast furnace slag
  2.    Portland cement is made employing wet process
  3.    Gypsum is added to portland cement to lengthen its setting time
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 86. A mixture of chlorine & sodium bromide acts as a/an
  1.    Insecticides
  2.    Analgesic drug
  3.    Fire retardant
  4.    Hydrogenation catalyst
 Discuss Question
Answer: Option C. -> Fire retardant
Question 87. __________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
  1.    Phosphates
  2.    Chromates
  3.    Sulphates
  4.    Bi-carbonates
 Discuss Question
Answer: Option B. -> Chromates
Question 88. Hydrazine (N₂H₄) is used mainly as a/an
  1.    Explosive
  2.    Rocket fuel
  3.    Detergents additive
  4.    None of these
 Discuss Question
Answer: Option B. -> Rocket fuel
Question 89. Common salt is generally not produced commonly by __________ method from brine.
  1.    Freeze drying
  2.    Electrolytic
  3.    Solar evaporation
  4.    Vacuum evaporation
 Discuss Question
Answer: Option A. -> Freeze drying
Question 90. Sugar content in sugarcane on cane basis is about __________ percent by weight.
  1.    1 to 5
  2.    5 to 10
  3.    15 to 20
  4.    20 to 30
 Discuss Question
Answer: Option B. -> 5 to 10

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