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Question 9 Which of the following statement is incorrect for a chemical reaction? (a) Heat may be given out but never absorbed.(b) Sound may be produced.(c) A colour change may take place.(d) A gas may be evolved.

Answer»

Question 9

Which of the following statement is incorrect for a chemical reaction?
(a) Heat may be given out but never absorbed.
(b) Sound may be produced.
(c) A colour change may take place.
(d) A gas may be evolved.



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