Home
Class 11
CHEMISTRY
How many of the following in dinking wat...

How many of the following in dinking water below 30 ppm do not cause any effect on the body as per international standards of water? `Pb^(2+), Hg^(2+), Mn^(2+), Cd^(2+), Cl^(-), NO_(3)^(-), SO_(4)^(2), Ca^(2+), Mg^(2+)`

A

5

B

2

C

3

D

6

Text Solution

Verified by Experts

The correct Answer is:
1
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL CHEMISTRY

    NARAYNA|Exercise EXAMPLES|11 Videos

  • ENVIRONMENTAL CHEMISTRY

    NARAYNA|Exercise W.E|5 Videos

  • ENVIRONMENTAL CHEMISTRY

    NARAYNA|Exercise LEVEL-I (H.W)|45 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY

    NARAYNA|Exercise EXERCISE - 4|17 Videos

  • F-BLOCK ELEMENTS

    NARAYNA|Exercise LEVEL-II (C.W)|1 Videos

Similar Questions

Explore conceptually related problems

Choose the correct set for international standards for drinking water. (P) F^(ϴ) lt 2 ppm , (Q) Pb lt 50 ppb (R) SO_(4)^(2-) le 500 ppm , (S) NO_(3)^(-) le 50 ppm

Among the following how many of the molecules are linear. CO_(2), NO_(2)^(-), SO_(2), N_(3)^(-), C_(2)H_(2), I_(3)^(-), XeF_(2), CS_(2)

Total number of electrophiles present in the following are NO_(2)^(+), SO_(3), CN^(-), F^(-), C Cl_(4), NH_(3), , :C Cl_(2) .

How many anions will give colourles acid vapour/ gas with conc. H_(2)SO_(4) on reaction with following gives anions? CH_(3)COO^(-) ,Cl^(-),Br^(-),S^(2-),SO_(3)^(2-),BO_(3)^(3-),NO_(2)^(-),C_(2)O_(4)^(2-),I^(-)

How many of following anions have 1.5 bond order ? IO_(4^(-)), CH_(3)COO^(-), CO_(3^(2-)), NO_(3^(-)), BrO_(2^(-)), NO_(2^(-)), HCOO^(-), SO_(3^(2-)), ClO_(2^(-)), SO_(4^(2-)) and PO_(4^(3-))

How many of the following is/are soluble in 50% HNO_3 solution CdS,PbS,As_2S_3,CuS,HgS,Bi_2S_3

CaSO_(4)+Pb(NO_(3))_(2) to PbSO_(4)darr+Ca(NO_(3))_(2)

NARAYNA-ENVIRONMENTAL CHEMISTRY-LEVEL-II (H.W)
  1. Identify the wrong statement in the following :

    Text Solution

    |

  2. Important sinks for CO(2) are (A) Oceans (B) Plants (C) Microorgan...

    Text Solution

    |

  3. Which of the following statements are correct (A) Carbamates are ner...

    Text Solution

    |

  4. The acceptable level of carbon monoxide gas (CO) in the atmosphere in ...

    Text Solution

    |

  5. The consequences of global warming may be a)increase in average tempe...

    Text Solution

    |

  6. Green house effect is caused by (i) Acculation of O(2) in the atmosp...

    Text Solution

    |

  7. Which of the following is/are polluted? (a) Rain water, with pH 5.6 ...

    Text Solution

    |

  8. The acid responsible to make rain water acidic is (a) H(3)PO(4) (b) ...

    Text Solution

    |

  9. Air pollutant gases causing acid rain are :

    Text Solution

    |

  10. The smog is essentially caused by the presence of :

    Text Solution

    |

  11. Which of the following is/are responsible for photochemical smog forma...

    Text Solution

    |

  12. Formaton of London smog takes place in

    Text Solution

    |

  13. Identify the incorrect statement from the following:

    Text Solution

    |

  14. Cataract and skin cancer are caused by

    Text Solution

    |

  15. What are X and Y in the following reaction? CF(2)Cl(2) overset(UV)(r...

    Text Solution

    |

  16. How many of the following in dinking water below 30 ppm do not cause a...

    Text Solution

    |

  17. Agricultural outflows contains phosphate fertilizers leads to (A) En...

    Text Solution

    |

  18. It is preferred to bleach paper using

    Text Solution

    |

  19. Better medium of chemical reaction according to green chemistry is

    Text Solution

    |

  20. Which of the following statement are correct? (A) Ocean is sink for ...

    Text Solution

    |