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Which of the following is/are the example/examples of chemical change

Which of the following is/are the example/examples of chemical change?
1. Crystallization of sodium chloride
2. Melting of ice
3. Souring of milk
Select the correct answer using the code given below:

(a)

1 and 2 only

(b)

3 only

(c)

1, 2 and 3 only

(d)

None of the above

Answer:

(b)

Core Books/NCERT

Explanation

Crystallisation of sodium chloride and ice melting are physical changes as they involve a change of state.Tikdam: Crystallisation of sodium chloride and ice melting are physical changes as they involve a change of state. Souring of milk is chemical – lactose into lactic acid