The filament of an electric bulb is made of
tungsten
nichrome
graphite
iron
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Diamond is an allotropic form of |
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Marsh gas is |
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LPG consists of mainly |
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Air is a/an |
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Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products? |
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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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