Home
Class 11
CHEMISTRY
Iron and manganese present in water are ...

Iron and manganese present in water are removed by

A

chlorination

B

aeration

C

filtration

D

lime soda treatment

Text Solution

Verified by Experts

The correct Answer is:
B
Due to aeration, impurities like `Fe` and `Mn` are oxidized and precipitated,
`Fe+O_(2) rarr Fe_(2)O_(3)`
`Fe_(2)O_(3)+H_(2)O rarr Fe(OH)_(3) darr`
`Mn+O_(2) rarr MnO`
`MnO+H_(2)O rarr Mn(OH)_(2) overset([O])(rarr) MnO_(2) darr`.
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL CHEMISTRY

    A2Z|Exercise Section B - Assertion Reasoning|14 Videos

  • ENVIRONMENTAL CHEMISTRY

    A2Z|Exercise AIPMT/NEET Questions|10 Videos

  • CLASSIFICTION, PURIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • HYDROCARBONS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

Hardness of water cannot be removed by

For the isolation of inert gases from air, the nitrogen and oxygen present are removed by nitrogen and oxygen present are removed by passing air over heated

Permanent hardness of water can be removed by

Which of the following regents are used to remove hardness present in water either temporary or permanent.

Only temporary hardness in water is removed by :

Disinfection of water removes

Manganese is required in

A2Z-ENVIRONMENTAL CHEMISTRY-Section D - Chapter End Test
  1. Iron and manganese present in water are removed by

    Text Solution

    |

  2. When polluted air is scrubbed with H(2)SO(4) solution,

    Text Solution

    |

  3. Negative soil pollutant is

    Text Solution

    |

  4. Which of the following chemical, harmful to ozone , released by chloro...

    Text Solution

    |

  5. Which of the following statement about sewage treatment is false?

    Text Solution

    |

  6. Oxides of sulphur and nitrogen can be removed by scrubbing with

    Text Solution

    |

  7. Which of the following in not an example of green chemistry?

    Text Solution

    |

  8. Which of the following is the coldest region of atmosphere

    Text Solution

    |

  9. Most hazardous metal pollutant of automobile exhausts is :

    Text Solution

    |

  10. NO and H(2)S both the pollutants of air. NO is H(2)S remover while H(2...

    Text Solution

    |

  11. The region which is greatly affected by air pollution is

    Text Solution

    |

  12. Classical smog occurs in places of :

    Text Solution

    |

  13. Which of the following is not a herbicide?

    Text Solution

    |

  14. Which of the following is not involved in the formation of photochemic...

    Text Solution

    |

  15. Which is not the constituent of photochemical smog?

    Text Solution

    |

  16. DDT is

    Text Solution

    |

  17. Smog can be controlled by

    Text Solution

    |

  18. Domestic waste mostly constitute:

    Text Solution

    |

  19. The gas leaked from a stronge tank of the Union Carbide plant in Bhopa...

    Text Solution

    |

  20. Which is not correct statement for classical smog?

    Text Solution

    |

  21. Which of the following is the primary precursor of photochemical smog?

    Text Solution

    |