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MCQs

Total Questions : 3103 | Page 6 of 311 pages
Question 51. Carborundum consists mainly of
  1.    Bauxite
  2.    Silicon carbide
  3.    Boron carbide
  4.    Calcium carbide
 Discuss Question
Answer: Option B. -> Silicon carbide
Question 52. Saponification number of an oil or fat
  1.    Gives an idea about its molecular weight
  2.    Is inversely proportional to its molecular weight
  3.    Detects its adulteration
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 53. CaSO₄ .1/2 H₂O is known as
  1.    Blue vitriol
  2.    Plaster of Paris
  3.    Gypsum
  4.    Zeolite
 Discuss Question
Answer: Option B. -> Plaster of Paris
Question 54. The difference between saponification value and acid value is
  1.    Called ester value
  2.    Always negative
  3.    Constant for all fatty oils
  4.    None of these
 Discuss Question
Answer: Option A. -> Called ester value
Question 55. Hydrogenation of oil takes place in a/an __________ reactor.
  1.    Autothermal
  2.    Trickle bed
  3.    Plug flow
  4.    None of these
 Discuss Question
Answer: Option B. -> Trickle bed
Question 56. Celluloid is chemically
  1.    Cellulose acetate
  2.    Regenerated cellulose
  3.    Cellulose nitrate
  4.    Cellulose acetate butyrate
 Discuss Question
Answer: Option C. -> Cellulose nitrate
Question 57. Cement mainly contains
  1.    CaO, SiO₂, Al2O₃
  2.    MgO, SiO₂, K₂O
  3.    Al2O₃, MgO, FE₂O₃
  4.    CaO, MgO, K₂O
 Discuss Question
Answer: Option A. -> CaO, SiO₂, Al2O₃
Question 58. Chemical formula of oleum is
  1.    H₂SO₃
  2.    H₂SO₄
  3.    H₂S₂O₇
  4.    H₂SO₇
 Discuss Question
Answer: Option C. -> H₂S₂O₇
Question 59. Chemical name of 'alum' is
  1.    Barium sulphate
  2.    Aluminium sulphate
  3.    Aluminium chloride
  4.    Calcium sulphate
 Discuss Question
Answer: Option B. -> Aluminium sulphate
Question 60. Chemical name of soda ash is
  1.    Sodium bicarbonate
  2.    Sodium thiosulphate
  3.    Potassium carbonate
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these

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