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General Knowledge : Questions Answers : Environment Science



1.

What percentage of land area should remain covered by forest to maintain Ecological balance?

   A. 10%.

   B. 5%.

   C. 33%.

   D. None of these.



2.

Full form of CTBT is;

   A. Comprehensive Test Ban Treaty.

   B. Comprehensive Test Bank Trust.

   C. Comprehensive Trust Ban Treaty.

   D. Comprehensive Test Ban Trusty.



3.

Full form of BOD is;

   A. Bactorial Oxygen Demand.

   B. Biological Oxygen Demand.

   C. Biological Oxide Demand.

   D. None of these.



4.

In Atmosphere nitrogen consists of;

   A. 25%.

   B. 12%.

   C. 92%.

   D. 78%.



5.

Full form of COD is;

   A. Chemical Oxide Demand.

   B. Chemical Oxygen Demand.

   C. Chemical Ozone Demand.

   D. None of these.