Question

name the gas evolved when metal reacts with an acid and how can it be tested​

Answer 1

Answer:

H2 gas is evolved when a metal reacts with an acid. NaOH + HCl ----> NaCl + H2. (Fun fact : this reaction is also called neutralization reaction).

It can be tested by bringing a burning matchstick to the brim of the test tube and a pop sound is emitted.

Answer 2

Answer:

The gas which is evolved on reaction of metals with acid is Hydrogen Gas.

It can be tested by:-

Bring a burning matchstick or burning splinter near the gas, it will burns with a pop sound means a popping sound will be produced.

Hope it helps.....