CBSE Class 10 Answered
Write the chemical equation of the reaction in which the following changes have taken place with an example of each:
(i) Change in colour
(ii) Change in temperature
(iii) Formation of precipitate
Asked by pachchigarkeyur | 08 Mar, 2022, 12:05: PM
Expert Answer
(i)Change of colour
Example:
When few pices of Fe are added to the blue copper sulphate solution, the colour of the solution fades
and turns into light green due to the formation of ferrous sulphate.
(ii) Change in Temperature-
The action of dilute sulphuric acid on zinc.
Heat is evolved in this reaction.
(3)Formation of Precipitate-
Example:
When silver nitrate is added to sodium chloride, white insoluble precipitate of silver chloride is formed.
When ferrous sulphate solution is added to the sodium hydroxide, a dirty green precipitate ferrous hydroxide is formed.
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