Home
Class 11
CHEMISTRY
COD of a water sample is 8ppm the weight...

COD of a water sample is 8ppm the weight of acidified `K_(2)Cr_(2) O_(7)` required to oxidise the organie matter present in one litre of water sample is

A

98 mg

B

49 mg

C

196 mg

D

98 g

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL CHEMISTRY

    AAKASH SERIES|Exercise EXERCISE ON PASSAGE (PASSAGE-I)|4 Videos

  • ENVIRONMENTAL CHEMISTRY

    AAKASH SERIES|Exercise EXERCISE ON PASSAGE (PASSAGE-II)|4 Videos

  • ENVIRONMENTAL CHEMISTRY

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE - 2B|20 Videos

  • ELEMENTS OF CARBON FAMILY

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE - 3 (Recent AIPMT/NEET Questions) |10 Videos

  • GENERAL ORGANIC CHEMISTRY

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|35 Videos

Similar Questions

Explore conceptually related problems

The COD value of a water sample is 40 ppm. Calculate the amount of acidified K_(2)Cr_(2)O_(7) required to oxidise the organic matter present in 500 ml of that water sample.

Acidified K_(2)Cr_(2)O_(7) turns green by

10^(-3) gm equivalents of K_(2) Cr_(2) O_(7) in 50% H_(2) SO_(4) is needed to oxidise all the organic matter present in 1 lit of water. Then COD of water is

100 ml of sample of water requires 3.92 mg of K_2 Cr_2O_3 in presence of H_2SO_4 for the oxidation of dissolved organic matter present in it. The COD of the water sample in ppm

AAKASH SERIES-ENVIRONMENTAL CHEMISTRY-OBJECTIVE EXERCISE - 3
  1. The BOD values of four samples of water A,B,C and D are 165 ppm. 120pp...

    Text Solution

    |

  2. When rain is accompanied by a thunderstorm, the collected rain water w...

    Text Solution

    |

  3. Which of the following reaction causes depletion of ozone layer in sum...

    Text Solution

    |

  4. A sample of pond water contains 40mg of organic matter requires 32mg o...

    Text Solution

    |

  5. Nerve toxins are

    Text Solution

    |

  6. Which is incorrectly matched ?

    Text Solution

    |

  7. Modes of controlling pollution in large cities include

    Text Solution

    |

  8. TLV values of four pollutants A,B,C and D are 2ppm, 9 ppm, 20 ppm and ...

    Text Solution

    |

  9. 100 ml of sample of water requires 3.92 mg of K2 Cr2O3 in presence of ...

    Text Solution

    |

  10. COD of a water sample is 8ppm the weight of acidified K(2)Cr(2) O(7) r...

    Text Solution

    |

  11. Proper management of disposal of household and industrial wastes can b...

    Text Solution

    |

  12. Incomplete combustion of petrol in automobile engines can be detected ...

    Text Solution

    |

  13. Among the oxides of nitrogen, a brown coloured gas is

    Text Solution

    |

  14. The compound used as refrigerant is

    Text Solution

    |

  15. Poisonous gas present in the exhaust fumes of car is

    Text Solution

    |

  16. Surface water contains

    Text Solution

    |

  17. Tolerable limits of lead and fluorides in drinking water according to ...

    Text Solution

    |

  18. In Antarctica ozone depletion is due to the formation of following com...

    Text Solution

    |

  19. Pollutant of automobile exhausts that affects nervous system and produ...

    Text Solution

    |

  20. Negative soil pollution is

    Text Solution

    |