Question

WHICH AMONG THE FOLLOWING FACTORS ARE NOT SEEN IN CHEMICAL CHANGE

1 point

CHANGE IN COLOUR

CHANGE IN TEMPERATURE

CHANGE IN SPEED OF REACTION

EVOLUTION OF GAS

Clear selection​

Answer 1

Explanation:

In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition. Although we call them physical "reactions," no reaction is actually occurring. In order for a reaction to take place, there must be a change in the elemental composition of the substance in question. Thus, we shall simply refer to physical "reactions" as physical changes from now on.