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प्रश्न
The yellow colour shown by nitric acid can be removed by ______.
पर्याय
adding magnesium powder
boiling the acid
passing ammonia through warm acid
passing air through warm acid
MCQ
रिकाम्या जागा भरा
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उत्तर
The yellow colour shown by nitric acid can be removed by passing air through warm acid.
Explanation:
Bubbling dry air or carbon dioxide through warm yellow nitric acid drives out the dissolved brown NO2 gas, making it colourless.
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