Question

Diya was doing some experiments. The steps of procedure are given here.
i) Took two test tubes, marked them as A and B.
ii) Put small pieces of copper wire in both the test.
iii) Added 4 to 5 drops of dilute hydrochloric acid in test tube A and dilute
sulphuric acid in test tube B.
iv) Brought a lighted match stick near the mouth of the test tubes
The observation would be:​

Answer 1

What are we supposed to do√√√√√