Question

answer the following question (a) write the main activities that help us to determine a chemical reaction​

Answer 1

Explanation:

1 ) change in colour

2) change in temperature

it is the main activites help us to determine the chemical reactions

Answer 2

The following changes are observed during chemical reaction:

(1) Change in physical state of the substance.

(2) Change in colour observed in the substance.

(3) Evolution of a gas appears during the reaction.

(4) Change in temperature of the reaction-mixture during the reaction.

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