Home
Class 12
BIOLOGY
Which of the following is incorrect abou...

Which of the following is incorrect about ozone ?
i. The bad ozone is found in the upper part of atmosphere
ii. Thickness is measured in terms of Dobson units
iii. Ozone gas is formed by action on UV rays on molecular oxygen
iv. Ophthalmic problems may increase with ozone depletion

A

iii only

B

i and iv

C

i ii and iii

D

i only

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NTA NEET SET 47

    NTA MOCK TESTS|Exercise BIOLOGY|90 Videos

  • NTA NEET SET 49

    NTA MOCK TESTS|Exercise BIOLOGY|90 Videos

Similar Questions

Explore conceptually related problems

Which of the following statements above about ozone are not true? a) Ozone is formed in the stratosphere. b) Ozone is good in the troposphere and bad in the stratosphere. c) Ozone depletion is maximum near poles.

Which of the following can exhibit resonance? (i) Oxygen (ii) Ozone (iii) Allene (iv) Hydrogen peroxide

How many of the following statements are correct ? 1. Good ozone is found in the stratosphere. 2. UV radiation having a lower wavelength than UV -B is almost completely absorbed by the Earth's atmosphere. 3. UV - B causes snow blindness and cataract. 4. dB is a unit to measure the thickness of ozone.

Which of the following statements is/are not true? (i) Ozone layer occurs naturally in the atmosphere. (ii) Thinning of ozone layer allows more UV radiations to pass through it and cause harmful effects on humans, plants and animals. (iii) The region of the stratosphere that contains relatively high concentration of ozone is called troposphere.

Which of the following statements is/are incorrect about columnar epithelium? (i) It is made of tall and slender cells. (ii) Free surface may have microvilli. (iii) They are found in stomach and intestine and help in secretion and absorption. (iv) Ciliated epithelium is mainly present in hollow structures like bronchioles and Fallopian tubes. (v) They have apical nuclei.

Assertion: In the stratosphere, ozone is produced by the action of UV radiations on dioxygen. Reason: UV radiations split the molecules oxygen into free oxygen (O) atoms which combine with molecular oxygen to form ozone.

Which of the following statements about conducting system of the heart is INCORRECT ? I. Mass of nodal tissue seen in the lower-left corner of the right atrium is the sinoatrial node. II. The nodal musculature can generate action potentials only in response to external stimuli . III. The number of action potential that could be generated in a minute varies at different parts of the nodal system . IV. The SAN can generate the maximum number of action potential , i.e., 80-85 min^(-1)

NTA MOCK TESTS-NTA NEET SET 48-BIOLOGY
  1. Pollen germination can be prominently seen in

    Text Solution

    |

  2. Which of these is not a function of the gaseous hormone ?

    Text Solution

    |

  3. Which of the following is incorrect about ozone ? i. The bad ozone i...

    Text Solution

    |

  4. Given below are the steps involved in the citric cycle . Arrange them ...

    Text Solution

    |

  5. Which of these processes involve tissue culture ? I. Somatic hybriza...

    Text Solution

    |

  6. Rye has two kinds of varieties: autumn and spring varieties. The corre...

    Text Solution

    |

  7. In the artery,

    Text Solution

    |

  8. Which of these statements about the counter current mechanism is true ...

    Text Solution

    |

  9. Gene pool can be defined as

    Text Solution

    |

  10. Colour - blindness occurs in

    Text Solution

    |

  11. Which of the following terms doesn't mean one and the same ?

    Text Solution

    |

  12. A patient suffering from Down's syndrome was carefully examined . Ther...

    Text Solution

    |

  13. Arrange the following in the chronological order of their appearance i...

    Text Solution

    |

  14. Identify the odd one from the list of organisms given below :

    Text Solution

    |

  15. Which one of the following scientists shared the same views about evol...

    Text Solution

    |

  16. Match the enzymes given in column I with the substrates they act upon ...

    Text Solution

    |

  17. Observe the diagram given below : Which of the following statemen...

    Text Solution

    |

  18. A pure pea plant having yellow and round seeds in an inflated pod was ...

    Text Solution

    |

  19. Which of the following is incorrect about allergy ?

    Text Solution

    |

  20. Which of these statements is incorrect about Platyhelminthes ?

    Text Solution

    |