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The maximum concentration of cadmium in drinking water is

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Important Questions on Environmental Chemistry

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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
The presence of soluble fluoride ion upto 1 ppm concentration in drinking water, is :
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
BOD stands for:
MEDIUM
Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
Biochemical Oxygen Demand BOD is the amount of oxygen required (in ppm ):
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
Eutrophication causes
MEDIUM
Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting 3Ca3PO42.CaOH2 to:
MEDIUM
Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
Identify the correct statements from the following
I) Chemical Oxygen Demand (COD) of water is determined by oxidising organic substances with acidified K2Cr2O7
II) High concentration of CO2 leads to stiffness of flower buds
III) NO2 is a lung irritant
IV) Photochemical smog is also called reducing smog.
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
The maximum prescribed concentration of copper in drinking water is:
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
BOD is a measure of
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
Which of the following conditions in drinking water causes methemoglobinemia?
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
Addition of phosphate fertilizers to water bodies causes:
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
Eutrophication causes
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
Water samples with BOD values of 4 ppm and 18 ppm, respectively, are:
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
A water sample has ppm level concentration of the following metals:

Fe=0.2; Mn=5.0; Cu=3.0; Zn=5.0 .

The metal that makes the water sample unsuitable for drinking is
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of:
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
Water filled in two glasses A and B gave BOD values of 10 and 20, respectively. The correct statement regarding them is
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
A water sample has ppm level concentration of following anions

F-=10; SO42-=100; NO3-=50

The anion/anions that make/makes the water sample unsuitable for drinking is/are
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution

Assertion: The deficiency of fluoride in drinking water causes diseases such as tooth decay etc.

Reason: The F- ions make the enamel on teeth much harder by converting hydroxyapatite, the enamel on the surface of the teeth, into much harder fluorapatite.

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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution

The anion/anions that make/makes the water sample unsuitable for drinking, in which ppm level concentration of  F-=10, SO42-=100, NO3-=50  is/ are:

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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
High concentration of fluoride is poisonous and harmful to bones and teeth at levels over
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Chemistry>Inorganic Chemistry>Environmental Chemistry>Water Pollution
Mention the standards prescribed by BIS for quality of drinking water.