Environmental Issues- Quiz 1

The phenomenon by which certain pollutants (e.g. DDT) accumulate in body tissue in increasing concentration is called

• Biological magnification

• Biological reduction

• Bio-precipitation

• Bio-degradation

Minamata disease is caused by contamination of

• Hg

• Pb

• Cd

• As

Which is a non-degradable pollutant?

• Smoke

• Polythene

• Copper scraps

• Iron scraps

Which of the following is a natural pollutant?

• Smog

• Volcanic gases

• Strong wind

• Gale

As the organic waste input in a water body increases,

• BOD increases

• BOD decreases

• BOD may increase or decrease

• Cannot be said with surety

Pick out the correct choice from the following

• As BOD increases, DO increases

• As BOD increases, DO decreases

• It depends on the water body and the surrounding environment

• No such relation exists between BOD & DO

When and where the Ozone hole was discovered?

• 1985, Antarctica

• 1985, Arctic

• 1987, Arctic

• 1987, Antarctica

Thickness of ozone is measured in

• Decibel

• Dozen

• Dobson

• Meter

Which of the following is correct about “El Nino effect”?

• temperature rise leads to odd climatic changes

• cutting down the use of fossil fuels.

• planting trees

• slowing down the growth of human population.

According to size of air pollutants, range and types of chemical the below shown device is best used to control which of the following pollutants?

• large particulates

• charged particulate matter

• dissolved gases

• fine particles