(a)What happens when an acid reacts with a metal? Give the chemical equation of the reaction involved.

(b) Which gas is usually liberated when an acid reacts with a metal? How will you test for the presence of this gas?

Answer:

(a) When an acid reacts with a metal, then a salt and hydrogen gas are formed.

b) When acid combines with metal, hydrogen gas is released. The development of gas bubbles has been seen along the metal’s surface. The obtained bubbles are then passed through a soap solution, and(d when a burning candle is brought close to the bubble, the gas present in the soap bubble burns with a pop sound, indicating that it is hydrogen. Only hydrogen gas can make a pop sound when it burns, so it can be concluded that it is hydrogen.