General Science Questions and Answers

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Q51
Which of the following does not contain a coinage metal?
  • A Silver and Gold
  • B Zinc and Gold
  • C Copper and Silver
  • D Copper and Gold
Answer: Option B
Q52
Which metal pollute the air of a big city?
  • A Copper
  • B Chromium
  • C Lead
  • D Cadmium
Answer: Option C
Q53
Bell metal is an alloy of
  • A nickel and copper
  • B zinc and copper
  • C brass and nickel
  • D tin and copper
Answer: Option D
Q54
Water is a good solvent of ionic salts because
  • A it has a high specific heat
  • B it has no colour
  • C it has a high dipole moment
  • D it has a high boiling point
Answer: Option C
Q55
Which of the following is not an isotope of hydrogen?
  • A Tritium
  • B Deuterium
  • C Protium
  • D Yttrium
Answer: Option D
Q56
The main constituents of pearls are
  • A calcium oxide and ammonium chloride
  • B calcium carbonate and magnesium carbonate
  • C aragonite and conchiolin
  • D ammonium sulphate and sodium carbonate
Answer: Option B
Q57
Amalgams are
  • A highly coloured alloys
  • B alloys which contain mercury as one of the contents
  • C alloys which have great resistance to abrasion
  • D alloys which contain carbon
Answer: Option B
Q58
Which of the following is the lightest metal?
  • A Mercury
  • B Lithium
  • C Lead
  • D Silver
Answer: Option B
Q59
Which of the following metals remain in liquid for under normal conditions?
  • A Radium
  • B Zinc
  • C Uranium
  • D Mercury
Answer: Option D
Q60
Potassium Permanganate is used for purifying drinking water, because
  • A it is a sterilising agent
  • B it dissolves the impurities of water
  • C it is a reducing agent
  • D it is an oxidising agent
Answer: Option D

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