Teachoo MCQ Test

Assertion Reasoning Quiz

Preparing for CBSE

Chapter 13 Class 10 - Our Environment | 5 questions

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.
Time remaining 360
Question 1 of 5
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Question 1 of 5
Assertion (A): Decomposers keep the environment clean.
Reason (R): They recycle matter by breaking down the organic remains and waste products of plants and animals.
Select one option. Answers are shown after the test.
Question 2 of 5
Assertion (A): Ozone is both beneficial and damaging.
Reason (R): Stop the release of chlorofluorocarbons to protect the ozone.
Select one option. Answers are shown after the test.
Question 3 of 5
Assertion (A): CFCs deplete the ozone layer.
Reason (R): CFCs are used as refrigerants and in fire extinguishers.
Select one option. Answers are shown after the test.
Question 4 of 5
Assertion (A): The concentration of harmful chemicals is more in human beings.
Reason (R): Man is at the apex of the food chain.
Select one option. Answers are shown after the test.
Question 5 of 5
Assertion: Greater number of individuals are present in lower trophic levels.
Reason: The flow of energy is unidirectional.
Select one option. Answers are shown after the test.