Answer:
where are those two images which you have sent
Physical change is where u change physically or on the "outside" hope this helps, have a great day!
Answer: Option (4) is the correct answer.
Explanation:
When sulfuric acid reacts with calcium hydroxide then it results in the formation of calcium sulfate and water.
The chemical reaction for the same will be as follows.

Thus, we can conclude that
salt is produced when sulfuric acid and calcium hydroxide react completely.
The answer is c)11 because copper has 11 valence electrons