General Knowledge - General Science
Exercise :: General Science - Elements and Metals
| 56. |
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
Explanation:
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| 57. |
Which of the following is not an isotope of hydrogen? |
| A. |
Tritium | | B. |
Deuterium | | C. |
Protium | | D. |
Yttrium |
Answer: Option D
Explanation:
http://en.wikipedia.org/wiki/Isotopes_of_hydrogen
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| 58. |
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
Explanation:
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| 59. |
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
Explanation:
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| 60. |
Which of the following is the lightest metal? |
Answer: Option B
Explanation:
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