Question

Which of the following gasses is formed when dil.hydrochloric acid is poured on peices of chalk?

Answer 1

Answer:

Hydrogen gas if iam correct

Answer 2

Answer:

On adding dilute HCl to chalk piece, CO2 is evolved.

Explanation:

Step 1: Even when diluted, chalk will dissolve in a strong acid like hydrochloric. Chalk has the chemical formula CaCO3. Hydrochloric acid has the chemical formula HCl. When hydrochloric acid and chalk powder combine, carbon dioxide is released, turning lime water milky.

Step 2: An illustration of an acid-carbonate reaction is this. Calcium carbonate, which is present in chalk, is acidified by hydrochloric acid. A metal salt is created in this case, calcium chloride, together with water and carbon dioxide bubbles.

Step 3: Hydrogen gas is produced when dilute hydrochloric acid is added to a reactive metal.

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