Home
Class 12
BIOLOGY
Why are industrial effluents more diffic...

Why are industrial effluents more difficult to manage than municipal sewage? Name a disease caused by heavy metal contamination.

Text Solution

Verified by Experts

Industrail effluents contain hydrocarbons , lots of toxic chemical and heavy metals which are not only nonbiodergradable but also extermely harmful to ecological system even at low concertration , Minimata disease by Mercury contamination.
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL ISSUES

    ICSE|Exercise PRACTICE QUESTIONS (SHORT ANSWER TYPE-II QUESTIONS)|19 Videos

  • ENVIRONMENTAL ISSUES

    ICSE|Exercise PRACTICE QUESTIONS (LONG ANSWER TYPE QUESTIONS)|17 Videos

  • ENVIRONMENTAL ISSUES

    ICSE|Exercise PRACTICE QUESTIONS (VERY SHORT ANSWER TYPE QUESTIONS)|27 Videos

  • ECOSYSTEMS

    ICSE|Exercise COMPETITION CORNER (ASSERTION AND REASON TYPE QUESTIONS (FOR AIIMS ASPIRANTS))|14 Videos

  • EVOLUTION

    ICSE|Exercise COMPETITION CORNER (Assertion and Reason Type Questions (For AIIMS aspirants))|26 Videos

Similar Questions

Explore conceptually related problems

Name two water pollution related diseases caused by heavy elements.

Assertion : Cultural eutrophication is nutrient enrichment of water bodies due to human activities like passage of sewage, industrial effluents, etc. Reason : The prime contaminants from sewage and industrial effluents are nitrates and phosphates, which act as plant nutrients and overstimulate the growth of algae.

Why it is more difficult to rotate a stone by tieing it to a longer string than shorter string ?

Observe figure and answer the following questions. (i) The ecological term used to describe the DDT accumulation at different troohic levels ? (ii) List any one effect of DDT accumulation on birds. (iii) Will DDT accumulation lead to eutrophication ? (iv) Does it affect the BOD? (v) Name disease caused by accumulation of any heavy metal.

Why were micronutrients later than macro- nutrients? With one example each, mention the physiological role and deficiency disease caused by (i) nitrogen, (ii) phosphorus, (ii) copper, and (iv) iron.

The second ionisation energies are higher than the first ionisation energies. This is mainly due to the fact the after the removal of the first electron, the atom changes into monovalent positive ion. In the ion, the number of electrons decreases but the nuclear charge remains the same. as a result of this, the remaining electrons are held more tightly by the nucleus and it becomes difficult to remove the second electron. therefore, the value of second ionisation energy. (IE_(2)) , is greater than that of the first ionisatio energy (IE_(1)) . similarly third ionisation energy (IE_(3)) is greater than that of second IE_(2) . Q. Correct order of ionisation potential of coinage metals is:

The second ionisation energies are higher than the first ionisation energies. This is mainly due to the fact the after the removal of the first electron, the atom changes into monovalent positive ion. In the ion, the number of electrons decreases but the nuclear charge remains the same. as a result of this, the remaining electrons are held more tightly by the nucleus and it becomes difficult to remove the second electron. therefore, the value of second ionisation energy. (IE_(2)) , is greater than that of the first ionisatio energy (IE_(1)) . similarly third ionisation energy (IE_(3)) is greater than that of second IE_(2) . Q. IE_(1) and IE_(2) of Mg metal are 178 and 348 kcal/mol respectively. the energy required for the given reaction is: Mg(s) to Mg^(+2)+2e^(-)

The second ionisation energies are higher than the first ionisation energies. This is mainly due to the fact the after the removal of the first electron, the atom changes into monovalent positive ion. In the ion, the number of electrons decreases but the nuclear charge remains the same. as a result of this, the remaining electrons are held more tightly by the nucleus and it becomes difficult to remove the second electron. therefore, the value of second ionisation energy. (IE_(2)) , is greater than that of the first ionisatio energy (IE_(1)) . similarly third ionisation energy (IE_(3)) is greater than that of second IE_(2) . Q. IE_(1) and IE_(2) of Mg metal are 178 and 348 kcal/mol respectively. the energy required for the given reaction is: Mg(s) to Mg^(+2)+2e^(-)