Question

19. Assertion (A): In the electroplating factories the disposal of the used conducting solution is a major concern. Reason (R): It is a polluting waste and there are specific disposal guidelines to protect the environment. (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A. (c) A is true but R is false. (d) A is false but R is true. 20. Assertion (A): Vibrating objects produce sound, in some cases the vibrations are easily visible but in most cases they are not. Reason (R): The amplitude is so small that we cannot see them. (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A. (c) A is true but R is false. (d) A is false but R is true. 21. Assertion (A): Friction can never be entirely eliminated Reason (R): The surface is perfectly smooth. (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A. (c) A is true but R is false. (d) A is false but R is true. 22. Assertion (A): Porters place a round piece of cloth on their heads. Reason (R): By doing this they decrease the area of contact of the load with their head. (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A.

please need the answer fast ​

Answer 1

Answer:

In electroplating factory, the disposal of the used conducting solution is a major concern because it is a polluting waste, therefore it should be disposed off according to the disposal guidelines of the local authority

Explanation:

you can check out ncert example learn cbse

Answer 2

Answer: In electroplating factory, the disposal of the used conducting solution is a major concern because it is a polluting waste, therefore it should be disposed off according to the disposal guidelines of the local authority.

Mark as Brainliest if it helped!