Which of the following statements is incorrect for a chemical reaction?
  1. Heat may be given out but never absorbed.
  2. Sound may be produced.
  3. A colour change may take place.
  4. A gas may be evolved.

AcademicChemistryNCERTClass 7

Correct answer: (a) Heat may be given out but never absorbed.

Explanation: Heat may be given out or absorbed during a chemical reaction.

raja
Updated on 10-Oct-2022 13:21:31

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