Which gas is used in refrigeration plants ?
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what is the name of the material used in making the plates used for serving food in hotels?
Mention a few application of cod test in environmental engineering practice.
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Explain extraction of ephedrine from a mineral block?
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What is Liquation ?
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Which gas used for purifying, air in underground enterprises ?
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Any reaction can be reversed by applying potential. But, why can't we recharge the primary cell?