Select all the signs of a chemical change from the list below. (you may need to select more than one for full points) evaporating bubbles (gas formation) color change dissolving

Answer : The correct options are, Bubbles (gas formation)  and color change.

Explanation :

Chemical change : It is a change where changes occurs in the chemical composition and thus resulting in the formation of new compound or substance. It is an irreversible reaction.

The indication of chemical changes are :

Formation of gas bubbles.

Formation of precipitate.

Change in color.

Change in temperature.

Change in volume.

Change in smell or taste.

Evolution of heat, light and sound.

Physical change : It is a change in which shape and size of a substance changes. In this there is no change in the chemical composition of the substance and no new substance is forming. It is a reversible reaction.

The indication of chemical changes are :

Change in shape.

Change in form.

Change in size.

Change in phase.

(1) Evaporating : It is a physical change because only changes takes place in the phase from liquid phase to vapor phase.

(2) Bubbles (gas formation) : It is an indicator of chemical change.

(3) Color change : It is an indicator of physical change.

(4) Dissolving : It is a physical change because only changes takes place in the phase from solid phase to liquid phase.

Hence, the correct options are, Bubbles (gas formation)  and color change.

is there multiple choice answers?

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