General Knowledge :: General Science
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The variety of coal in which the deposit contains recognisable traces of the original plant material is
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Tetraethyl lead is used as
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The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
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The gases used in different types of welding would include
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The property of a substance to absorb moisture from the air on exposure is called
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In which of the following activities silicon carbide is used?
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