Home
Class 12
BIOLOGY
[A] : An estimation of B.O.D gives an in...

[A] : An estimation of B.O.D gives an indication of the amount of pollution in a body of water .
[R] : B.O.D is measure of the oxygen requirements of the bacteria , which are living in the water .

A

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

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Drug Addiction

    TRUEMAN BIOLOGY|Exercise ASSERTION AND REASON|20 Videos
  • ECOSYSTEM

    TRUEMAN BIOLOGY|Exercise MCQ|179 Videos

Similar Questions

Explore conceptually related problems

[A] : Population density of indicator organisms show degree of water pollution . [R] : BOD is an index of organic waste in water .

BOD of waste water is estimated by measuring the amount of

Calculate the molar mass of water if it contains 50% heavy water (D_(2)O) .

Rapid interconversion of o-D-glucose and B-D-glucose in solution is known as:

Biochemical Oxygen demand (BOD) is a measure of organic metrtal present in water BOD value less than 5 ppm indicate w water sample to be

Expand B.O.D.

The volume of a drop of water is 0.04 mL . How many H_(2) O molecules are there in a drop of a water? d = 1.0 g mL .

A non metal A the largest constituent of air, when heated with hydrogen in the 1:3 ratio in the presence of Fe as catalyst, gives a gas B. On heating with oxygen it gives an oxide C. If this oxide is passed through water in the presence of oxygen it gives an acid D, a strong oxidizing agent. a. Identify A,B,C and D b. To which group of the periodic table does this non metal belong?

TRUEMAN BIOLOGY-Ecology -ASSERTION AND REASON
  1. [A] : There is a gradual increase in the energy content at successive ...

    Text Solution

    |

  2. [A] : Carbon monoxide is poisonous . [R] : It destroys RBC .

    Text Solution

    |

  3. [A] : An estimation of B.O.D gives an indication of the amount of poll...

    Text Solution

    |

  4. [A] : PAN is a secondary pollutant . [R] : The secondary pollutants ...

    Text Solution

    |

  5. [A] : Soil particles , particularly clay and organic matter in soil , ...

    Text Solution

    |

  6. [A] : Algal blooms deplete dissolved O(2) levels in polluted water bod...

    Text Solution

    |

  7. [A] : Orchids are most threatened plants in tropics . [R] : Tropical...

    Text Solution

    |

  8. [A] : Vegetation in the catchment areas prevents flash floods in the d...

    Text Solution

    |

  9. [A] : Sedimentation , a process that has been going on since the earth...

    Text Solution

    |

  10. [A] : When the organisms live together in such a manner that one organ...

    Text Solution

    |

  11. [A] : Aerenchyma is a specialized tissue in some water plants characte...

    Text Solution

    |

  12. [A] : The pyramid of biomass indicates the decrease or the gradual red...

    Text Solution

    |

  13. [A] : Climate is affected by vegetation . [R] : The indirect factors...

    Text Solution

    |

  14. [A] : Man is the consumer of the ecosystem . [R] : An antiforest con...

    Text Solution

    |

  15. [A] : The importance of ecosystem lies in flow of energy and cycling o...

    Text Solution

    |

  16. [A] : Biomonitoring is reliable for determining the pollutants in air ...

    Text Solution

    |

  17. [A] : The food webs are very important in maintaining the stability of...

    Text Solution

    |

  18. [A] : If phytoplanktons are destroyed in the sea then it will effect t...

    Text Solution

    |

  19. [A] : Epiphytes are not found in Delhi . [R] : Delhi has semi-arid c...

    Text Solution

    |

  20. [A] : Water logged soils are physiologically dry . [R] : When the s...

    Text Solution

    |