Ozone layer of atmosphere absorbs:
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Air shows the property of
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The most abundant constituent of atmospheric air is :
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The percentage of oxygen in air is approximately
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The major constituent of air is
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The percentage of Nitrogen in Air is
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Air is said to be saturated when :
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For extinguishing fire, we use
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Dry powder fire extinguishers contain
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Dry ice is the solid form of :
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Diamonds are glittering and attractive because light incident on them undergoes
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If lime water is kept in the air, it turns milky due to presence of :
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Diamond is harder than graphite because of :
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The gas used to extinguish fire is
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Which among the following coal contains 90 per cent of carbon?
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One carat of diamond is equal to
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Carbon dioxide is
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Hardest allotrope of carbon is
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Diamond is lustrous because
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Q100
Open questionDry ice is
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