Question

which has is usually liberated when an acid reacts with a metal ? How will you test for the presence of this gas ?

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Answer 1

Question:

which has is usually liberated when an acid reacts with a metal ? How will you test for the presence of this gas ?

Answer:

• When acid reacts with metal, hydrogen gas is evolved

• When we bring a burning match stick or candle to the mouth of the delivery tube, it produces a pop sound

Answer 2

Answer:

• Hydrogen gas is liberated when an acid reacts with a metal.
• Presence of hydrogen gas can be detected by burning splinter
• Take a burning splinter and put over the place where reaction is taking place.
• If hydrogen gas is present the fire ends with a 'pop' sound (mini explosion).

Hope this will help