Question

17. Which of the following does not change when a chemical reaction takes place?
a) volume
(b) mass
(c) physical properties
(d) chemical properties
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Answer 1

Answer:

b) mass

because of law of conservation of mass

Answer 2

Answer:

(b) Mass

Mass does not change when a chemical reaction take place.

Explanation:

In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.