Home
Class 12
BIOLOGY
Assertion: Excess of ozone in tropospher...

Assertion: Excess of ozone in troposphere called bad ozone while excess in stratosphere is known as "good" ozone.
Reason: In troposphere ozone acts as pollutant while in
stratosphere it protects from U.V. radiations.

A

If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.

B

If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion

C

If Assertion is True but the Reason if False.

D

If both Assertion `&` Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ORGANISM & ENVIRONMENT AND DEMOGRAPHY

    ALLEN|Exercise EXERCISE-III|110 Videos

  • NEURAL CONTROL AND COORDINATION

    ALLEN|Exercise Questions|61 Videos

  • ORGANISM AND POPULATION (ECOLOGY)

    ALLEN|Exercise S|26 Videos

Similar Questions

Explore conceptually related problems

Ozone present in stratosphere comes from

Oxygen plays a key role in troposphere while ozone in the stratosphere. Elaborate.

The protective ozone layer of stratosphere itself requires protection from indiscriminate use of :

The zone of atmosphere in which the ozone layer is present is called: (A) Troposphere (B) Ionosphere (C) Mesosphere (D) Stratosphere

Assertion : Ozone in the troposphere is a product of ultraviolet radiations acting on dioxygen molecules. Reason : Ozone is thermodynamically very stable.

Assertion (A) : Presently, the global atmosphere is warming up. Reason (R): The depletion of stratospheric ozone layer has resulted in increase in ultraviolet radiations reaching the Earth.

Assertion (A) : Presently, the global atmosphere is warming up. Reason (R): The depletion of stratospheric ozone layer has resulted in increase in ultraviolet radiations reaching the Earth.

With the depletion of ozone layer more UV radiation filters into the troposphere. UV radiations lead to :

Ozone layer protect us from the harmful effects of..........radiations.

Read the following statements carefully and select the incorrect ones. (i) Development of the fertile top-soil takes centuries, but it can be easily removed due to human activites such as over-cultivation, unrestricted grazing, etc. (ii) Waterlogging results in soil salinity. (iii) UV rays are responsible for degradation of ozone shield in atmosphere. (iv) Ozone present in troposphere acts as a shield abosrbing UV radiations coming from the Sun. (v) Global warming can be controlled by increasing the use of fossil fuels.

ALLEN-ORGANISM & ENVIRONMENT AND DEMOGRAPHY-Assertion and Reason
  1. Assertion: Competition always occurs between closely related species c...

    Text Solution

    |

  2. Assertion: Female mosquito is not considered as parasite although it ...

    Text Solution

    |

  3. Assertion: Decomposition is one of the most vital functional attribute...

    Text Solution

    |

  4. Assertion: Temperature and soil moisture are the important climatic fa...

    Text Solution

    |

  5. Assertion: In Terrestrial, ecosystem much larger fraction of energy fl...

    Text Solution

    |

  6. Assertion:-Detritus food chain may be connected with grazing food chai...

    Text Solution

    |

  7. Assertion: Climax community is in near equilibrium with the environmen...

    Text Solution

    |

  8. Assertion: Biodiversity and its conservation are vital environmental i...

    Text Solution

    |

  9. Assertion: There is no clearcut estimation about biodiversity of proka...

    Text Solution

    |

  10. Assertion: Removal of key stone species from any ecosystem leads to de...

    Text Solution

    |

  11. Assertion: Introduction of alien species is responsible for extinction...

    Text Solution

    |

  12. Assertion: Co-extinction is also one of the evil quartet about biodive...

    Text Solution

    |

  13. Assertion: Sacred groves are also one of the mean of ex-situ conservat...

    Text Solution

    |

  14. Assertion : An electrostatic precipitator (ESP) is a particulate colle...

    Text Solution

    |

  15. Assertion : There is a sharp decline in dissolved oxygen downstream fr...

    Text Solution

    |

  16. A : A few toxic substance often present in industrial waste waters und...

    Text Solution

    |

  17. Assertion:- During integrated waste water treatment in town of Arcata ...

    Text Solution

    |

  18. Assertion: Excess of ozone in troposphere called bad ozone while exces...

    Text Solution

    |

  19. [A] : Suspended particulate matter (SPM) is an important pollutant rel...

    Text Solution

    |

  20. Assertion (A) : Presently, the global atmosphere is warming up. Reas...

    Text Solution

    |