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Assertion (A) : The temperature in the t...

Assertion (A) : The temperature in the thermosphere increases with altitude.
Reason (R) : Ozone present in stratosphere absorbs ultraviolet radiation

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-ENVIRONMENTAL CHEMISTRY-OBJECTIVE EXERCISE - 1 (Definition of terms- Introduction)
  1. Composition of PAN is

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  2. Match the following

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  3. Assertion (A) : The temperature in the thermosphere increases with alt...

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  4. (A): Ionosphere contains gases in the ionised form which form the base...

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  5. Assertion (A) : Rain water normally has a pH of 5.6. Reason (R) : Th...

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  6. (A): Smaller particles (Size < 5 microns) cause fibrosis of the lung l...

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  7. Among the following which is a contaminent

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  8. Which of the following is contaminant responsible for Bhopal gas trage...

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  9. A substance which is not present in nature but added to atmoshphere du...

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  10. Identification of a pollutant as organic, inorgamic (or) organometalli...

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  11. The medium which reacts wi lh pollutant is called

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  12. The sink for dead plants and animals is

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  13. Which of the following can act as sink for CO2 and SO2

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  14. Water is said to be polluted if the D.O value of water is less than

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  15. The amount of oxygen required for healthy growth of plants and animals...

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  16. A good quality of water will have

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  17. The amount of oxygen required to oxidise organic substance present in ...

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  18. Chemical oxygen demand is determined by using

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  19. COD is a measure of

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  20. The amount of oxygen used by micro organisms present in water for five...

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