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NCERT Exemplar Solutions Class 7 Science Solutions for Physical and Chemical Changes - Exercise in Chapter 6 - Physical and Chemical Changes

Question 14 Physical and Chemical Changes - Exercise

A chemical change may involve –

(a) change in colour only

(b) change in temperature only

(c) evolution of gas only

(d) any or all of the above

Answer:

Answer is (d) any or all of the above

Explanation:

A chemical change may involve change in colour, temperature, smell or evolution of gas, heat, etc.

Video transcript
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