Question

What do you understand by physical change
and chemical change? Classify the following as
physical or chemical changes :
(i) Dissolving salt in water
(ii) Electric current is passed through water and
it is broken down into hydrogen and oxygen
(iii) Evaporation of alcohol
(iv) Digestion of food

Please don't spam Please give correct answer . ​

Answer 1

Answer:

physical changes = Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.

chemical change = Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis

Answer 2

$\huge\pink{\boxed{\green {\mathbb{\overbrace {\underbrace{\fcolorbox{red}{aqua}{\underline{\pink{ur\: answer }}}}}}}}}$

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions

1)Dissolving salt in water

chemical change

2) Electric current is passed through water and

it is broken down into hydrogen and oxygen

chemical change

3) Evaporation of alcohol

physical change

4)Digestion of food

its not related both.

it's biological change

hopes it's helps u :)