Science Quiz 49

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15
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From which mineral is radium obtained?

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Heavy water is?

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Which metal pollute the air of a big city?

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The property of a substance to absorb moisture from the air on exposure is called ?

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The most important ore of aluminium is?

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Potassium Permanganate is used for purifying drinking water, because?

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Permanent hardness of water can be removed by adding?

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Which of the following does not contain a coinage metal?

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Science Quiz 49
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