GK-General Science Question and Answer
GK-General Science Question and Answer
51. Which of the following does not contain a coinage metal?
- Silver and Gold
- Zinc and Gold
- Copper and Silver
- Copper and Gold
53. Bell metal is an alloy of
- nickel and copper
- zinc and copper
- brass and nickel
- tin and copper
54. Water is a good solvent of ionic salts because
- it has a high specific heat
- it has no colour
- it has a high dipole moment
- it has a high boiling point
55. Which of the following is not an isotope of hydrogen?
- Tritium
- Deuterium
- Protium
- Yttrium
56. The main constituents of pearls are
- calcium oxide and ammonium chloride
- calcium carbonate and magnesium carbonate
- aragonite and conchiolin
- ammonium sulphate and sodium carbonate
57. Amalgams are
- highly coloured alloys
- alloys which contain mercury as one of the contents
- alloys which have great resistance to abrasion
- alloys which contain carbon
59. Which of the following metals remain in liquid for under normal conditions?
- Radium
- Zinc
- Uranium
- Mercury
60. Potassium Permanganate is used for purifying drinking water, because
- it is a sterilising agent
- it dissolves the impurities of water
- it is a reducing agent
- it is an oxidising agent