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प्रश्न
What is the role of heated copper gauze in Dumas method?
पर्याय
To absorb carbon dioxide
To oxidise hydrogen
To reduce oxides of nitrogen back to nitrogen gas
To absorb water vapour
MCQ
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उत्तर
To reduce oxides of nitrogen back to nitrogen gas
Explanation:
Any oxides of nitrogen formed are reduced by hot copper to N₂ so that total nitrogen is collected as free gas.
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