CLASS: X-SCIENCE-CHAPTER: OUR ENVIRONMENT-MCQ

CLASS: X-SCIENCE

CHAPTER: OUR ENVIRONMENT

MCQ

1.  Which of the following is a biodegradable substance?

       I.  Glass

      II.  Plants

     III.  Plastics

     IV.  Polythene

2.  Which of the following is a non-biodegradable substance?

       I.  Virgin plastic

      II.  Plastic

     III.  Plants

     IV.  Plant producers

3.  The constituents which do not form eco-system are

       I.  Biotic constituents

      II.  Plastic bags

     III.  Abiotic constituents

     IV.  All of these

4.  The functional unit of environment is

       I.  Ecosystem

      II.  Nitrogen

     III.  Carbon

     IV.  Oxygen

5.  Which of the following is an example of producers?

       I.  Plastic pens

      II.  Plastic cans

     III.  Polythene

     IV.  Green plants

6.  Which of the following is an example of herbivores?

       I.  Cow

      II.  Shark

     III.  Lion

     IV.  Tiger

7.  Which of the following is an not example of abiotic factors?

       I.  Light

      II.  Plants

     III.  Heat

     IV.  Temperature

8.  _______ is not a biodegradable pollutant.

       I.  Paper

      II.  Cotton cloth

     III.  Cotton

     IV.  DDT

9.  Which of the following is terrestrial ecosystem?

       I.  A natural forest

      II.  A lake

     III.  A pond

     IV.  An aquarium

10.  _______ is an omnivore animal.

       I.  Lion

      II.  Hawk

     III.  Jackal

     IV.  Man

11.  The formula of Ozone is _______

       I.  O₃

      II.  O₂

     III.  O₄

     IV.  O₆

12.  The number of atoms of oxygen present in ozone are

       I.  3

      II.  4

     III.  2

     IV.  1

ANSWERS

      1.   II

      2.   II

      3.   II

      4.   I

      5.   IV

      6.   I

      7.   II

      8.   IV

      9.   I

      10. IV

      11. I

      12. I