Question

Potassium chloride is added to water and stirred a salt solution is obtained which is there in boiled leaving behind a Residue 1. Is the above change physical or chemical 2. Name the Residue which remains behind after the salt solution is boiled 3. Is the change reversible or Irreversible 4. Are the composition and properties of the original substance altered 5. Give a reason why the above experimentation would not be possible if calcium carbonate is taken in place of potassium chloride

Answer 1

Answer:

1 ) physical change

2 ) pottasium chloride

3 ) Reversible

4 ) no

5 ) it would not dissolved as calcium carbonate is highly in soluble in water and is if it dissolve it in a little quantity then it will evolve carbon dioxide gas

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