232947
Which of the following is the outermost layer of the atmosphere?
1 Troposphere
2 Exosphere
3 Mesosphere
4 Thermosphere
Explanation:
Exosphere
2. Air
232948
Read the following statements: Ozone is found mostly in the stratosphere Ozone layer lies 55-75 km above the surface of the earth. Ozone absorbs ultraviolet radiation from the Sun. Ozone layer has no significance for life on the earth. Which set of the statements is correct?
1 i and iii
2 ii and iv
3 ii and iii
4 i and iv
Explanation:
i and iii Stratosphere The Ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9.3 to 21.7 mi) above Earth. The ozone layer absorbs 97 to 99 percent of the Sun's medium-frequency ultraviolet light.
2. Air
232949
Assertion (A): Troposphere is the most important layer as the air we breathe in exists here. Reason (R): The ozone layer which protects us from the harmful ultraviolet rays of the Sun exists here.
1 Both are correct and R is the explanation of A
2 Only A is correct
3 Both are incorrect
4 Both are correct but R is not the explanation of A.
232947
Which of the following is the outermost layer of the atmosphere?
1 Troposphere
2 Exosphere
3 Mesosphere
4 Thermosphere
Explanation:
Exosphere
2. Air
232948
Read the following statements: Ozone is found mostly in the stratosphere Ozone layer lies 55-75 km above the surface of the earth. Ozone absorbs ultraviolet radiation from the Sun. Ozone layer has no significance for life on the earth. Which set of the statements is correct?
1 i and iii
2 ii and iv
3 ii and iii
4 i and iv
Explanation:
i and iii Stratosphere The Ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9.3 to 21.7 mi) above Earth. The ozone layer absorbs 97 to 99 percent of the Sun's medium-frequency ultraviolet light.
2. Air
232949
Assertion (A): Troposphere is the most important layer as the air we breathe in exists here. Reason (R): The ozone layer which protects us from the harmful ultraviolet rays of the Sun exists here.
1 Both are correct and R is the explanation of A
2 Only A is correct
3 Both are incorrect
4 Both are correct but R is not the explanation of A.
232947
Which of the following is the outermost layer of the atmosphere?
1 Troposphere
2 Exosphere
3 Mesosphere
4 Thermosphere
Explanation:
Exosphere
2. Air
232948
Read the following statements: Ozone is found mostly in the stratosphere Ozone layer lies 55-75 km above the surface of the earth. Ozone absorbs ultraviolet radiation from the Sun. Ozone layer has no significance for life on the earth. Which set of the statements is correct?
1 i and iii
2 ii and iv
3 ii and iii
4 i and iv
Explanation:
i and iii Stratosphere The Ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9.3 to 21.7 mi) above Earth. The ozone layer absorbs 97 to 99 percent of the Sun's medium-frequency ultraviolet light.
2. Air
232949
Assertion (A): Troposphere is the most important layer as the air we breathe in exists here. Reason (R): The ozone layer which protects us from the harmful ultraviolet rays of the Sun exists here.
1 Both are correct and R is the explanation of A
2 Only A is correct
3 Both are incorrect
4 Both are correct but R is not the explanation of A.
232947
Which of the following is the outermost layer of the atmosphere?
1 Troposphere
2 Exosphere
3 Mesosphere
4 Thermosphere
Explanation:
Exosphere
2. Air
232948
Read the following statements: Ozone is found mostly in the stratosphere Ozone layer lies 55-75 km above the surface of the earth. Ozone absorbs ultraviolet radiation from the Sun. Ozone layer has no significance for life on the earth. Which set of the statements is correct?
1 i and iii
2 ii and iv
3 ii and iii
4 i and iv
Explanation:
i and iii Stratosphere The Ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9.3 to 21.7 mi) above Earth. The ozone layer absorbs 97 to 99 percent of the Sun's medium-frequency ultraviolet light.
2. Air
232949
Assertion (A): Troposphere is the most important layer as the air we breathe in exists here. Reason (R): The ozone layer which protects us from the harmful ultraviolet rays of the Sun exists here.
1 Both are correct and R is the explanation of A
2 Only A is correct
3 Both are incorrect
4 Both are correct but R is not the explanation of A.
