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GENERAL SCIENCE - ELEMENTS AND METALS MCQs

Total Questions : 70 | Page 6 of 7 pages
Question 51. . Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
  1.    Television
  2.    Refrigerator
  3.    Tube light
  4.    Cooking gas
 Discuss Question
Answer: Option B. -> Refrigerator
Question 52. . Balloons are filled with
  1.    nitrogen
  2.    helium
  3.    oxygen
  4.    argon
 Discuss Question
Answer: Option B. -> helium
Question 53. . Which metal pollute the air of a big city?
  1.    Copper
  2.    Chromium
  3.    Lead
  4.    Cadmium
 Discuss Question
Answer: Option C. -> Lead
Question 54. . Which of the following does not contain a coinage metal?
  1.    Silver and Gold
  2.    Zinc and Gold
  3.    Copper and Silver
  4.    Copper and Gold
 Discuss Question
Answer: Option B. -> Zinc and Gold
Question 55. . Water is a good solvent of ionic salts because
  1.    it has a high specific heat
  2.    it has no colour
  3.    it has a high dipole moment
  4.    it has a high boiling point
 Discuss Question
Answer: Option C. -> it has a high dipole moment
Question 56. . Bell metal is an alloy of
  1.    nickel and copper
  2.    zinc and copper
  3.    brass and nickel
  4.    tin and copper
 Discuss Question
Answer: Option D. -> tin and copper
Question 57. . Which of the following is not an isotope of hydrogen?
  1.    Tritium
  2.    Deuterium
  3.    Protium
  4.    Yttrium
 Discuss Question
Answer: Option D. -> Yttrium
Question 58. . Amalgams are
  1.    highly coloured alloys
  2.    alloys which contain mercury as one of the contents
  3.    alloys which have great resistance to abrasion
  4.    alloys which contain carbon
 Discuss Question
Answer: Option B. -> alloys which contain mercury as one of the contents
Question 59. . Which of the following is the lightest metal?
  1.    Mercury
  2.    Lithium
  3.    Lead
  4.    Silver
 Discuss Question
Answer: Option B. -> Lithium
Question 60. . The main constituents of pearls are
  1.    calcium oxide and ammonium chloride
  2.    calcium carbonate and magnesium carbonate
  3.    aragonite and conchiolin
  4.    ammonium sulphate and sodium carbonate
 Discuss Question
Answer: Option B. -> calcium carbonate and magnesium carbonate

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