As you have seen, ozone is formed in the upper atmosphere through the reaction: O(g) + O2 (g) → O3(g) Data has shown that this is first order with respect to oxygen atoms and first order with respect to diatomic oxygen. Write the rate law equation for this reaction.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

- lead + phosphoric acid = hydrogen + lead(ii) phosphate