Question

8. Describe how crystals of copper sulphate are prepared.
9. Explain how painting of an iron gate prevents it from rusting.​

Answer 1

Answer:

crystal of copper is prepared by following process-

Explanation:

1. add some drop of dilute sulphuric acid

2.then heat the solution

after some time add copper suphate

3.and wait for some time . after that the crystal of copper sulphate will be formed

Answer 2

Answer:

8 . Crystallization is the process by which we can obtain crystals of copper sulphate. In this process, a few drops of dilute sulphuric acid is added to water. The water is then boiled & as it starts boiling, copper sulphate powder is added with stirring. ... After some time the crystals of copper sulphate separate out.

9. The essential component for rusting is the contact of metal with oxygen and moisture. When the iron gate is painted, it protects the iron to get in contact with oxygen, hence prevents it from rusting.

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