2. Sample Papers
  3. 7th Class
  4. Science

7th Class Science Sample Paper Science Olympiad Model Test Paper-4

  • question_answer
    Mixing of unwanted substances in the air is called:

    A) Soil pollution     

    B) Land pollution

    C) Air pollution

    D) All of these

    E) None of these

    Correct Answer: C

You need to login to perform this action.
You will be redirected in 3 sec spinner