Question

Potassium chloride is added to water and stirred. A salt solution is obtained which is then boiled leaving behind a residue
a) Is the above change physical or chemical
b] Name the residue which remains behind after the salt solution is boiled.
c] Is the change reversible or not reversible.
d] Are the composition and properties of the original substance altered.
e] Give a reason why the above experimentation would not be possible, if calcium carbonate is taken ,in place of of potasium chloride .​

Answer 1

Answer:

(is this a maths question?!!!)

A.chemical

B.This experiment would not be possible because on heating CaCo3 it will get converted into CaO and CO2 whichi will escape without leaving any residue.

C.not reversible

D.no

E. Search for it on Google (soory I don't know the answer)