Question

which gas is usually liberated when an acid reacts with a metal illustrate with an example ? how can we test its presence

Answer 1

generally hydrogen gas is liberated when an acid is reacted with metal

Like H2SO4 React with any metal and a solution is ready and with the solution hydrogen gas is liberated

we can check the presence of hydrogen gas by passing it through soap bubbles and a Pop sound is made

Answer 2

when an acid is treated with metal,hydrogen gas is liberated.

eg.

Zn+HCl=ZnCl+H2

we can test its presence by placing a burning candle near it.when hydrogen gaa comes in contact with the burning candle we get a popping sound.

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