Environment Science Questions and Answers - General Knowledge

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1.

Which of the following process unit is used for air pollution control in chemical plants?

A. Thermal Oxidizer
B. VPCU
C. Fluidized bed Combustion
D. None of these.
Answer with Explanation
Answer: Option A
Explanation:

Thermal Oxidizer used in many chemical plants to control air pollution.

It helps to destroy hazardous air pollutants and volatile organic compounds at a high temperature and releases them into the atmosphere.


Discussion: Click to Discuss
2.

Full form of CTBT is;

A. Comprehensive Nuclear-Test-Ban Treaty.
B. Comprehensive Test Bank Trust.
C. Comprehensive Trust Ban Treaty.
D. Comprehensive Test Ban Trusty.
Answer with Explanation
Answer: Option A
Explanation:

Comprehensive Nuclear-Test-Ban Treaty or CTBT bans nuclear explosive testing for everyone, everywhere, in all environments. CTBT makes very difficult for the countries to test or develop any nuclear weapon. The CTBT was opened for signature in 1996.


Discussion: Click to Discuss
3.

What is the full form of BOD?

A. Bactorial Oxygen Demand.
B. Biological Oxygen Demand.
C. Biological Oxide Demand.
D. None of these.
Answer with Explanation
Answer: Option B
Explanation:

BOD or Biological Oxygen Demand indicates the amount of dissolved oxygen needed by biological microorganisms in the biological process of breaking down organic substances in water.

It is also called as Biochemical oxygen demand.


Discussion: Click to Discuss
4.

How much percentage of nitrogen consist in Earth's Atmosphere?

A. 25%.
B. 12%.
C. 92%.
D. 78%.
Answer with Explanation
Answer: Option D
Explanation:

Earth atmosphere consists of a layer of gases. It is known as air. The composition of Dry air contains; 78.09% of Nitrogen(N2), 20.95% of Oxygen (O2), 0.93% of Argon (Ar) and 0.04% of Carbon dioxide(CO2).

Also, it contains small amounts of other gases like; helium, neon, krypton, hydrogen and water vapour.

 


Discussion: Click to Discuss
5.

Full form of COD is;

A. Chemical Oxide Demand.
B. Chemical Oxygen Demand.
C. Chemical Ozone Demand.
D. None of these.
Answer with Explanation
Answer: Option B
Explanation:
No explanation for this question.

Discussion: Click to Discuss
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