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Select from the List the Gas that Matches the Description Given in Case this Gas is Used as a Reducing Agent in Reducing Copper Oxide to Copper

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Question

Select from the list the gas that matches the description given in case

[ammonia, ethane, hydrogen chloride, hydrogen sulfide, ethyne]

This gas is used as a reducing agent in reducing copper oxide to copper

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Solution

Ammonia

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2014-2015 (March) Science Paper 2

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