Environmental Chemistry

In municipal sewage, BOD values (in ppm) are:

• 1-5

• 100- 4000

• 50-90

• 20-40

In environmental chemistry, the medium which is affected by a pollutant is called as the.......

• sink

• slag

• solvent

• receptor

The maximum prescribed concentration of copper in drinking water is :

• 0.5 ppm

• 3 ppm

• 0.05 ppm

• 5 ppm

Assertion : Ozone is destroyed by CFCs in the upper stratosphere.

Reason : Ozone holes increase the amount of UV radiation reaching the earth.

• Assertion and reason are incorrect.

• Assertion is false, but the reason is correct.

• Assertion and reason are correct and the reason is the correct explanation for the assertion.

• Assertion and reason are correct, but the reason is not the explanation for the assertion.

Which is wrong with respect to our responsibility as a human being to protect our environment ?

• Avoiding the use of floodlighted facilities

• Setting up compost tin in gardens

• Restricting the use of vehicles

• Using plastic bags

The layer of atmosphere between 10 km to 50 km above the sea level is called as :

• Thermosphere

• Troposhere

• Mesosphere

• Stratosphere

Excessive release of CO₂ into the atmosphere results in

• depletion of ozone

• polar vertex

• formation of smog

• global warming

The regions of the atmosphere , Where clouds form where we live repectively, are

• Troposphere and stratosphere

• Stratosphere and Troposphere

• Stratosphere and Stratosphere

• Troposphere and Troposphere

Air pollution that occurs in sunlight is :

• Oxidising smog

• Reducing smog

• Fog

• Acid rain

The noble gas that does NOT occur in the atmosphere is :

• Ne

• He

• Kr

• Ra