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Exercise: Chemistry
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Questions for: Chemistry
The mineral containing both magnesium and calcium is
A:
magnesite
B:
calcite
C:
carnallite
D:
dolomite
Answer:
D
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The main chemical constituent of clay is
A:
silicon oxide
B:
aluminium borosilicate
C:
zeolites
D:
aluminium silicate
Answer:
D
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The major constituent of air is
A:
nitrogen
B:
carbon dioxide
C:
oxygen
D:
hydrogen
Answer:
A
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The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2
nd
orbit to 3
rd
orbit is
A:
5x/36
B:
5x
C:
7.2 x
D:
x/6
Answer:
A
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The iron ore magnetite consists of
A:
Fe
2
O
3
B:
Fe
3
OH
4
C:
FeCO
3
D:
3Fe
2
O
3
.. 3H
2
O
Answer:
A
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