Exercise: General Science

Questions for: General Science

Which of the following is an element?
A:
Ruby
B:
Sapphire
C:
Emerald
D:
Diamond
Answer: D
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Potassium Permanganate is used for purifying drinking water, because
A:
it is a sterilising agent
B:
it dissolves the impurities of water
C:
it is a reducing agent
D:
it is an oxidising agent
Answer: D
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Which of the following metals remain in liquid for under normal conditions?
A:
Radium
B:
Zinc
C:
Uranium
D:
Mercury
Answer: D
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Which of the following is the lightest metal?
A:
Mercury
B:
Lithium
C:
Lead
D:
Silver
Answer: B
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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: B
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