Question

Dilute sulphuric acid is added to a small piece of granulated zinc. Tiny bubbles of gas are evolved.
i) name the gas evolved
ii) how will you identify gas evolved?

Answer 1

hydrogen...and the pop sound out from gas

Answer 2

Zn + H2So4 -----> ZnSo4 + H2 (g)


Here Zn being More reactive than Hydrogen displaces it.

i) The gas evolved is Hydogen
ii) This can be identified by bring a burning candle next to the test tube. The flame goes off with a pop sound.



Hope this answer helps you.