ICSE Class 9 Answered
State the main characteristic of chemical change give at least one example in each case
Asked by yu12mi3456 | 24 Jul, 2021, 10:24: PM
Expert Answer
Characteristics of chemical reaction:
1) Change of state of the reactants:
Example:
Ammonia gas reacts with hydrogen chloride gas to produce solid ammonium chloride.
2)Change of colour
Example:
Wehne 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.
3)Evolution of gas
Example:
4) 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.
Answered by Ramandeep | 27 Jul, 2021, 07:56: PM
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