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Introduction

In these questions, we are provided with two statements, one is called “Assertion” and the other is called “Reason”. The Assertion might be a fact or a general statement that is believed to be true. The reason is meant to explain why the assertion is true.

We need to judge whether the Assertion and the Reason statements are true. If both are true, then we need to see if the reason is the correct explanation of the Assertion.

Your Turn:

Each of the following questions has an assertion (A) and a reason (R). Mark answer as-

A. If both ‘A’ and ‘R’ are true and ‘R’ is the correct explanation of ‘A’.

B. If both ‘A’ and ‘R’ are true but ‘R’ is not the correct explanation of ‘A’.

C. If ‘A’ is true but ‘R’ is false.

D. If ‘A’ is false but ‘R’ is true.

E. If both ‘A’ and ‘R’ are false.

Practice Exercise 1:

Assertion: It has now been proved that eating high-fat diets, having decreased level of exercise and leading a stressful life lead to heart problems.

Reason: Fatty diets clot the blood in our arteries and hence sufficient amount of blood can’t reach the heart vessels.

Both assertion and reason are true and the reason correctly explains the assertion. So, A is the correct option.

Practice Exercise 2:

Assertion: A student who is indisciplined brings a bad name to himself, his parents, his teachers and also to his institute.

Reason: We must find out the grievances of our students and try to resolve them to a reasonable level so that it generates self-discipline in them.

Both assertion and reason are true but the reason does not explain how an indisciplined student brings a bad name to himself, his parents, his teachers and his institute. So, B is the correct option.

Practice Exercise 3:

Assertion: The Earth revolves around the Sun.

Reason: There are six planets in our Solar System.

The assertion is true. The reason is false as there are eight planets in our Solar System. So, C is the correct option.

Practice Exercise 4:

Assertion: The roses are only red in color.

Reason: The color of the roses is a biological adaptation.

The roses can be of different colors like yellow, white, pink, etc. So, the assertion is false. The reason is true. So, D is the correct option.

Practice Exercise 5:

Assertion: The filament inside the bulb is made up of iron.

Reason: Iron is a good conductor of electricity.

The filament inside the bulb is made up of tungsten, not iron. So, the assertion is false. The reason is true. So, D is the correct option.

Practice Exercise 6:

Assertion: The headquarters of the World Bank is situated in Washinton DC, United States.

Reason: World Bank is also the central bank of the United States of America.

The assertion is true but the reason is false. So, C is the correct option.

Practice Exercise 7:

Assertion: At constant temperature, the volume decreases as the pressure increases.

Reason: At constant temperature, the pressure is inversely proportional to the volume.

Both assertion and reason are true and the reason correctly explains the assertion. So, A is the correct option.

Practice Exercise 8:

Assertion: Ozone layer is not essential for life on earth.

Reason: Ozone (O3) is a highly reactive gas composed of three oxygen atoms.

The ozone layer absorbs most of the harmful ultraviolet radiation. So, it is essential for life on earth.

The assertion is false but the reason is true. So, D is the correct option.