When zinc reacts with dilute sulphuric acid, a salt is formed with the release of a
gas. The gas evolved during this reaction is: hydrogen
Give reaction for the above change. How will you test the presence of this gas?
Answers
Explanation:
Hydrogen gas is produced when zinc is reacted with sulphuric acid.
Zn+H
2
SO
4
(aq)→ZnSO
4
(aq)+H
2
Our Objective
To carry out the following reactions and classify them as Physical or Chemical changes.
Burning of magnesium in air
Sodium sulphate with barium chloride in the form of their solutions in water
Iron nail with copper sulphate solution in water
Zinc with dilute sulphuric acid
Heating of copper sulphate
The Theory
What is a chemical change?
In a chemical change, chemical reaction takes place and the substances undergo a change in their state. During chemical reactions, one substance reacts with another to form a new substance. The chemical composition of the new substance is different from that of the reacting species. Due to a chemical change, the chemical properties of matter also change. That means the product is entirely different from either of the reactants. Some chemical reactions may be either exothermic or endothermic in nature.
Explanation:
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