Home
Class 12
BIOLOGY
When there is a decrease in BOD ? (A) W...

When there is a decrease in BOD ?
(A) When mass of organic matter is used.
(B) When organic matter increases.
(C) Decrease in the water level.
(D) When there is an increase in the `O_2` quantity.

A

When mass of organic matter is used.

B

When organic matter increases.

C

Decrease in the water level.

D

When there is an increase in the `O_2` quantity.

Text Solution

Verified by Experts

The correct Answer is:
A
When mass of organic matter is used.
Promotional Banner

Topper's Solved these Questions

  • MICROBES IN HUMAN WELFARE

    KUMAR PRAKASHAN|Exercise SECTION - F MULTIPLE CHOICE QUESTIONS(MCQS FROM DARPAN BASED ON TEXTBOOK)|154 Videos

  • HUMAN REPRODUCTION

    KUMAR PRAKASHAN|Exercise SECTION-F MULTIPLE CHOICE QUESTIONS|118 Videos

  • MODEL QUESTION PAPER FOR ANNUAL EXAM

    KUMAR PRAKASHAN|Exercise Part- B ( Section C)|4 Videos

Similar Questions

Explore conceptually related problems

Name a greenhouse gas. What happens when its amount increases in the atmosphere?

When the atomic number Z of the nucleus increases

When the wavelength of scattered light is increased, then its scattering effect

…...... add organic matter to the soil and increase fertility

Which device is used to increase or decrease A.C. voltage ?

BOD of waste water is estimated by measuring the amount of (A) Total organic matter (B) Biodegradable organic matter (C) Oxygen evolution (D) Oxygen consumption

Calculate the change in intensity level when the intensity of sound increases by 10^(6) times its original intensity.

KUMAR PRAKASHAN-MICROBES IN HUMAN WELFARE -SECTION - F MULTIPLE CHOICE QUESTIONS(MCQS ASKED IN COMPETITIVE EXAM)
  1. Which one is proper pair?

    Text Solution

    |

  2. The most common biofertilizer for rice crop is

    Text Solution

    |

  3. When there is a decrease in BOD ? (A) When mass of organic matter is ...

    Text Solution

    |

  4. Which fungus is biocontrol agent? (A) Tricoderma (B) Aspergillus ...

    Text Solution

    |

  5. Which of the following is a main component of biogas ?

    Text Solution

    |

  6. Azolla is used as biofertilizer because it. (A) multiplies very fast ...

    Text Solution

    |

  7. Bio-pesticides are (A) The chemicals which are used to destroy the pe...

    Text Solution

    |

  8. From which living organism penicillin is produced ? (A) Fungus (B) ...

    Text Solution

    |

  9. Which virus is responsible for biotic control of insects and arthropod...

    Text Solution

    |

  10. In biogas plants one of these will be essential: (A) Azolla (B) Rhi...

    Text Solution

    |

  11. How flocks are made ? (A) By aerobic bacteria and filaments of fungi....

    Text Solution

    |

  12. Milk is spoiled or fermented by (A) Rhizobium (B) Lactobacillus (...

    Text Solution

    |

  13. Quantum 4000 is effective pest for cereals and vegetable crops is prep...

    Text Solution

    |

  14. During which process floc is formed ?

    Text Solution

    |

  15. From which of the following is citric acid is obtained ?

    Text Solution

    |

  16. BOD is a parameter of.......

    Text Solution

    |

  17. With whom BOD is associated ?

    Text Solution

    |

  18. The main sources of biofertilisers are

    Text Solution

    |

  19. Which is not a proper pair ?

    Text Solution

    |

  20. Which is the characteristic of Bt cotton ? (A) Increases immunity (...

    Text Solution

    |