Question

give an example of a chemical reaction for each of the following situations:

a)a change in colour is observed
b)a gas evolved
c)sound is produced
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Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

1 Answer. Reaction between copper sulphate soludon and zinc metal. The blue colour of the copper sulphate solution fades away and a red brown metallic copper is formed, Reaction between baking soda and vinegar.

2 Answer. Reaction between copper sulphate soludon and zinc metal. The blue colour of the copper sulphate solution fades away and a red brown metallic copper is formed, Reaction between baking soda and vinegar. Baking soda on reaction with vinegar produces carbon dioxide

3 Answer. Reaction of silver nitrate and potassium chloride. A precipitate of silver chloride is formed. When water is heated above boiling point, it converts into vapours.

Explanation:

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