Exercise: Chemistry

Questions for: Chemistry

The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
A:
atomic structure
B:
metallurgy
C:
periodic table of contents
D:
discovery of elements
Answer: C
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The molecular formula of phosphorous is
A:
P1
B:
P2
C:
P3
D:
P4
Answer: D
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The inert gases are ____ in water
A:
sparingly soluble
B:
insoluble
C:
soluble
D:
None of these
Answer: A
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The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
A:
liquation
B:
leaching
C:
levigation
D:
magnetic separation
Answer: C
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The metal that is usually extracted from sea water is
A:
Ca
B:
Na
C:
K
D:
Mg
Answer: D
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