Question

Physical changes which are not reversible
c) Chemical cha
411. Give an example of a chemical reaction for each:
a) A change in colour is observed. b) A gas is evolved. c) Sound is pro
Q12. Why ozone acts as a natural shield against the UV radiation?
Q13. Explosion of a firework is a chemical change. Explain.
Q14. Define: a) Galvanisation b) Crystallisation
Q15. Why does the blue colour of copper sulphate changes to green when
the chemical reaction also​

Answer 1

Answer:

I don't know but I am sorry