Chapter 16

Non-biodegradable pollutants are created by:

• a.nature
• b.excessive use of resources
• c.humans
• d.natural disasters

According to the Central Pollution Control Board, the diameter of particles that are responsible for causing great harm to human health is:

• a.2.5 micrometer
• b.5.0 micrometer
• c.10.0 micrometer
• d.7.5 micrometer

The material generally used for sound proofing of rooms like a recording studio and auditorium is:

• a.cotton
• b.coir
• c.wood
• d.styrofoam

Compressed Natural Gas (CNG) is:

• a.propane
• b.methane
• c.ethane
• d.butane

World’s most problematic aquatic weed is:

• a.Azolla
• b.Wolffia
• c.Eichhornia
• d.Trapa

Which of the following exhibits biomagnification?

• a.SO2
• b.Mercury
• c.DDT
• d.Both b & c

The expanded form of DDT is:

• a.dichloro diphenyl trichloroethane
• b.dichloro diethyl trichloroethane
• c.dichloro dipyrydyl trichloroethane
• d.dichloro diphenyl tetrachloroacetate

Which of the following material takes the longest time for biodegradation?

• a.Cotton
• b.Paper
• c.Bone
• d.Jute

Choose the incorrect statement.

• a.The Montreal protocol is associated with the control of emission of ozone depleting substances
• b.Methane and carbon dioxide are green house gases
• c.Dobson units are used to measure oxygen content of air
• d.Use of incinerators is crucial to disposal of hospital wastes

Among the following which one causes maximum indoor chemical pollution?

• a.burning coal
• b.burning cooking gas
• c.burning mosquito coil
• d.room spray

The green scum seen in the fresh water bodies is:

• a.blue green algae
• b.red algae
• c.green algae
• d.both (a) and (c)

The loudness of a sound that a person can withstand without discomfort is about

• a.150 dB.
• b.215 dB.
• c.30 dB.
• d.80 dB. ENVIRONMENTAL ISSUES 115

The major source of noise pollution world wide is due to:

• a.office equipment
• b.transport system
• c.sugar, textile and paper industries
• d.oil refineries and thermal power plants.

Match the following and choose the correct option Column I Column II A. Environment Protection Act i. 1974 B. Air Prevention & Control of Pollution Act ii. 1987 C. Water Act iii. 1986 D. Amendment of Air Act to include noise iv. 1981 as an air pollutant The correct matches is;

• a.A-iii, B-iv, C-i, D-ii
• b.A-i, B-iii, C-ii, D-iv
• c.A-iv, B-i, C-ii, D-iii
• d.A-iii, B-iv, C-ii, D-i

Catalytic converters are fitted into automobiles to reduce emission of harmful gases. Catalytic converters change unburnt hydrocarbons into:

• a.carbon dioxide and water
• b.carbon monoxide
• c.methane
• d.carbon dioxide and methane

Why is it necessary to remove sulphur from petroleum products?

• a.To reduce the emission of sulphur dioxide in exhaust fumes
• b.To increase efficiency of automobiles engines
• c.To use sulphur removed from petroleum for commercial purposes
• d.To increase the life span of engine silencers

Which one of the following impurities is easiest to remove from wastewater?

• a.Bacteria
• b.Colloids
• c.Dissolved solids
• d.Suspended solids

Which one of the following diseases is not caused due to contamination of water?

• a.Hepatitis-B
• b.Jaundice
• c.Cholera
• d.Typhoid

Nuisance growth of aquatic plants and bloom-forming algae in natural waters is generally due to high concentrations of:

• a.carbon
• b.sulphur
• c.calcium
• d.phosphorus

Algal blooms impart a distinct colour to water due to:

• a.their pigments
• b.excretion of coloured substances
• c.formation of coloured chemicals in water facilitated by physiological degradation of algae.
• d.absorption of light by algal cell wall.

Match the items in column I and column II and choose the correct option: Column I Column II A. UV i. Biomagnification B. Biodegradable Organic matter ii. Eutrophication C. DDT iii. Snow blindness D. Phosphates iv. BOD The correct match is:

• a.A-ii, B-i, C-iv, D-iii
• b.A-iii, B-ii, C-iv, D-i
• c.A-iii, B-iv, C-i, D-ii
• d.A-iii, B-i, C-iv, D-ii

In the textbook you came across “Three Mile Island and Chernobyl disasters associated with accidental leakage of radioactive wastes.” In India we had Bhopal gas tragedy. It is associated with which of the following?

• a.CO2
• b.Methyl Isocyanate
• c.CFC
• d.Methyl Cyanate