This is a timed quiz. You will be given 15 seconds per question. Are you ready?
15
Potassium Permanganate is used for purifying drinking water, because?
Correct!
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Heavy water is?
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Wrong!
Permanent hardness of water can be removed by adding?
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Wrong!
The property of a substance to absorb moisture from the air on exposure is called ?
Correct!
Wrong!
Which of the following does not contain a coinage metal?
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Wrong!
The most important ore of aluminium is?
Correct!
Wrong!
Which metal pollute the air of a big city?
Correct!
Wrong!
From which mineral is radium obtained?
Correct!
Wrong!
Science Quiz 49
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