Answer the following:
The diagram illustrates an experiment in which Shilpa places reddish-brown copper powder in a china dish and heats it strongly using a burner placed below a tripod stand and wire gauze. Examine the setup carefully and answer the questions.
1. Which substance undergoes oxidation in this reaction? Explain.
2. Shilpa keeps the copper powder in a closed container without air and heats it. Will the colour change occur? Explain.