Environmental Issues - Online Test
Q1.
Air pollution is:
i. 5th leading cause of deaths in Indian sub-continent.
ii. ranked among top 10 killers in the world.
iii. 7th most dangerous killer in south Asia.
Answer : Option A
Explaination / Solution:
Air pollution causes a number of respiratory disease including lung cancer. It is the 5th leading causes of deaths in Indian sub-constinent and 7th most dangerous killer in south Asia.
Q2. A sure indicator of air pollution is
Answer : Option A
Explaination / Solution:
Bioindicators are living organisms that respond in an especially clear way to a change in the environment.
The lichens are useful bioindicators for air pollution, espeially sulfur dioxide pollution, since they derive their water and essential nutrients mainly from the atmosphere rather than from the soil.
The polluted air have very less or no lichens.
Q3. Term acid rain was coined for the first time by
Answer : Option A
Explaination / Solution:
Robert August Smith was a Scottish chemist, who investigated numerous environmental issues. He is known for his research on air pollution in 1852, in the course of which he discovered what came to be known as acid rain. He is sometimes referred to as the 'Father of Acid Rain'.
Acid rain occurs due to presence of Sulphur dioxide and nitrogen oxide in atmosphere.
Q4. In normal adults, the enzyme which catalyses conversion of MHb into Hb is :
Answer : Option C
Explaination / Solution:
Methemoglobin cannot bind oxygen, unlike oxyhemoglobin. It is bluish chocolate-brown in color.
In human blood a trace amount of methemoglobin is normally produced spontaneously, but when present in excess the blood becomes abnormally dark bluish brown.
The NADH-dependent enzyme methemoglobin reductase (MHbreductase enzyme) is responsible for converting methemoglobin back to hemoglobin. . MHb is inactive forms that is converted into Hb that carries oxygen in blood.
Q5. The noise level that can cause permanent impairment of hearing ability of human beings :
Answer : Option D
Explaination / Solution:
Noise pollution is a kind of air pollution that may cause permanent impairmentof hearing ability of human beings.
After 150 dB (firecracker) sounds can be felt in the form of shock waves. The pressure difference they cause in the medium can actually be felt by your body. 150 decibels is usually considered enough to burst your eardrums,
Q6. An amendment in Air (Prevention and control of Pollution) Act1981 included a new pollutant named :
Answer : Option C
Explaination / Solution:
The Air (Prevention and Control of Pollution) Act, 1981 an Act of the Parliament of India to control and prevent air pollution in india. It was amended in 1987.
There are some definations of the act.
Definitions. – In this Act, unless the context otherwise requires,
- “air pollutant” means any solid, liquid or gaseous substance (including noise)] present in the atmosphere in such concentration as may be or tend to be injurious to human beings or other living creatures or plants or property or environment;
- “air pollution” means the presence in the atmosphere of any air pollutant;
- “approved appliance” means any equipment or gadget used for the burning of any combustible material or for generating or consuming any fume, gas or particulate matter and approved by the State Board for the purposes of this Act;
Q7. Smog which doesn’t contain any secondary pollutants is
Answer : Option D
Explaination / Solution:
Classical smog does not contain any secondary pollutants. It is a mixture of fog, sulfur dioxide and coal smoke particulates. Photochemical smog is formed by chemical reactions of sunlight, nitrogen oxide and voltalic organic compounds in the atmosphere to form secondary pollutants.
Q8. Match the following:
Pollutant
a) nitrogen oxides
b) fluorides
c) PCBs
d) Chlorofluorocarbons
Source
i) jet aeroplane emissions
ii) coal burning
iii) lightening
iv) burning plastics
Pollutant
a) nitrogen oxides
b) fluorides
c) PCBs
d) Chlorofluorocarbons
Source
i) jet aeroplane emissions
ii) coal burning
iii) lightening
iv) burning plastics
Answer : Option B
Explaination / Solution:
Nitrogen oxides is released by lightening, fluorides from coal burning, PCBs from burning plastics and chlorofluorocarbons from jet aeroplanes emissions.
Q9.
Read the following statements:
i. carbondioxide is a qualitative pollutant.
ii. carbondioxide is already present in environment and is termed as pollutant when it’s concentration increases in the environment:
Answer : Option B
Explaination / Solution:
Carbon dioxide is a quantitative pollutant. This gas is already present in environment in small quantity. When its concentration increases in the environmentit is termed as pollutant. It may cause greenhouse effect also.
Q10. Which of the following is a line source of air pollution?
Answer : Option B
Explaination / Solution:
A line source, as opposed to a point source, area source, or volume source, is a source of air, noise, water contamination or electromagnetic radiation that emanates from a linear (one-dimensional) geometry.
A smoking person while walking is line source of air pollution as the smoke released by smoking person spread in linear direction.
