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This is an experiment to test for reducing property of copper and oxidative property of nitrogen (iv) oxide
-Air inside combustion tube has oxygen which will otherwise combine with hot copper. So it is essential to pass Nitrogen(iv)oxide before heating to drive air out.
- Cold copper does not combine with oxygen since it has not reach activation energy to combine
Kipssben answered the question on August 20, 2018 at 18:27
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