Question

What do u observe when zinc metal is added to dilute sulphuric acid and a burning candle is brought near the mouth of the test tube?

Answer 1

The candle burns out with a pop sound due to the release of hydrogen gas

Answer 2

When zinc metal reacts with Sulphuric acid then hydrogen gas is evolved.

Zn+ H2SO4-----> ZnSO4+ H2

And when a burning candle is brought near the mouth of the test tube then the hydrogen gas bubbles produces a pop sound.

Hope it helps..