Assertion (A) The ozone layer present in the upper atmosphere of Earth is benefi

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Question
Assertion (A)
The ozone layer present in the upper atmosphere of Earth is beneficial for sustaining life on the Earth.
Reason (R)
The ozone layer blocks the harmful ultraviolet rays from the Sun and thus proctects life on the Earth.
Options
A. if both A and R are true and R is the correct explanation of A
B. if both A and R are true and 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

Correct Answer

if both A and R are true and R is the correct explanation of A

Explanation

Both A and R are true and R is the reason for A.

1. Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words. knot: Watt: Fathom
Options
A. The terms are used by sailors.
B. The terms are used for installing electricity.
C. The terms are connected with rope.
D. They are units of measurement.

2. Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words. Voodoo: Sorcery: Necromancy
Options
A. They are ancient arts found in sculptures.
B. They are terms connected with black magic.
C. They are ancient scripts.
D. They are means of communication of pre- historic age.

3. Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words. Knight: Rook: Bishop
Options
A. These are missionaries.
B. These are churchmen.
C. These are chessmen.
D. These are ranks of military.

4. Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words. Rourkela: Bokaro: Durgapur
Options
A. They have steel plants.
B. They have coal mines.
C. They have atomic power plants.
D. They are on the sea coast.

5. Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words. Baruni: Digboi: Ankleshwar
Options
A. They are famous for oil fields.
B. They are famous religious places.
C. They are tourist places of South India.
D. They are famous for handlooms.

8. Some mangoes are yellow. Some tixo are mangoes. Conclusions: (i) Some mangoes are green. (ii) Tixo is a yellow.
Options
A. Only conclusion (i) follows
B. Only conclusion (ii) follows
C. Either (i) or (ii) follows
D. Neither (i) nor (ii) follows

9. 1.Water boils at 100 degree C 2.Water freezes at 0 degree C Conclusion: At low pressure ,water boils at lower temperature The conclusion drawn is
Options
A. True
B. false
C. either probably true or probably false
D. Irrelavent

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