Exercise: General Science

Questions for: General Science

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: B
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Which of the following is not an isotope of hydrogen?
A:
Tritium
B:
Deuterium
C:
Protium
D:
Yttrium
Answer: D
http://en.wikipedia.org/wiki/Isotopes_of_hydrogen
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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: C
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Which metal pollute the air of a big city?
A:
Copper
B:
Chromium
C:
Lead
D:
Cadmium
Answer: C
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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: B
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