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प्रश्न
Classify the following into elements, compounds and mixtures :
Marble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
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उत्तर
Elements: Gold, Diamond, Graphite
Compounds: Common salt, Marble, Chalk
Mixtures: Air, Brass, Sand, Petroleum, Sea-water
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