Question

1. Prove that dissolution of sodium chloride in water is physical change, with the help of an activity:-
2. With the help of an activity prove that mixing of sand and iron is physical change:-
3. Glowing of an electric bulb is temporary and reversible. Prove it with the help of an activity:-
4. Burning of a candle is both physical and chemical change. Justify it:-
5. Mixing of acid and a base is chemical change. Explain:-

PLEASE HELP ME​

Answer 1

Explanation:

when a acid and a base are placed together they react to neutralize the acid and base properties producing a salt.the H(+)cation of the acid combines with the OH(-) anion of the base to to form water the compound formed by the equation of the base and anion of the acid is called a salt