Science Quiz 142

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15
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Potassium Permanganate is used for purifying drinking water, because?

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Which of the following does not contain a coinage metal?

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Which metal pollute the air of a big city?

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The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of?

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From which mineral is radium obtained?

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Permanent hardness of water can be removed by adding?

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The most important ore of aluminium is?

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

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Science Quiz 142
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