Given below are two statements:
Statement I: Acid rain dissolves and washes away nutrients in the soil.
Statement II: Acid rain does not dissolve naturally occurring toxic substances.
In the light of the above statements, choose the most appropriate answer from the options given below.
Statement I is correct but Statement II is incorrect
Acid rain is rainfall (or other precipitation) made acidic mainly by sulphur dioxide and nitrogen oxides released from burning fossil fuels; these gases combine with atmospheric moisture to form sulphuric acid and nitric acid, which then fall back to earth.
Statement I is correct: acid rain lowers the soil pH and leaches out (dissolves and washes away) essential plant nutrients such as calcium, magnesium and potassium from the soil, thereby reducing soil fertility over time.
Statement II is incorrect: acid rain in fact does the opposite of what this statement claims — its acidity dissolves and mobilises naturally occurring toxic substances (such as aluminium and other heavy metals) that would otherwise remain bound in rocks and soil, releasing them into soil water and streams where they can harm plants and aquatic life and even enter drinking water supplies.
Therefore, Statement I is correct but Statement II is incorrect, since acid rain does mobilise toxic substances rather than leaving them undissolved.
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Electrostatic Precipitators are used to control
Given below are two statements:
Statement I: Fuel oxides of nitrogen (NOx) is created when nitrogen and oxygen in the combustion chamber are heated to as high as 1000° C temperature.
Statement II: Thermal NOx is often the dominant source in the total NOx emissions.
In the light of the above statements, choose the most appropriate answer from the options given below:At pH values above 7.5, the disinfectant capability of chlorine is
Match List I with List II
LIST I (Toxic substance) LIST II (Source) A. Chloroform I. Pesticide B. DDT II. Paints C. Aroclor III. Water purification D. Chromium IV. Plastics Choose the correct answer from the options given below:
Given below are two statements:
Statement I: Possibility of oxygen depletion is high in running and turbulent water bodies.
Statement II: Oxygen is added to water by photosynthesis of green plants, algae and cyanobacteria.
In the light of the above statements, choose the most appropriate answer from the optionsChemical Oxygen Demand (COD) is a measure of
Which of the following are used as disinfectant during water treatment.
A. Chlorine
B. Phosphorous
C. Ozone
D. Nitrogen
E. Ultraviolet Rays
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Assertion A: Volatile Organic compounds (VOCs) often are measured in the atmosphere as non-methane hydrocarbons.
Reason R : Methane is highly reactive in photochemical smog formation.
In the light of the above statements, choose the correct answer from the options given below:Given below are two statements :
Statement I : It is relatively easier to monitor and regulate water pollution caused by nonpoint sources than point sources.
Statement II : Nonpoint sources of water pollution may be fairly uniform and predictable throughout the year.
In the light of the above statements, choose the correct answer from the options given below :
Give below are two statements:
Statement I : Thermal pollution, usually effluent from cooling systems of power plants or other industries, alters water temperature in a lake or stream.
Statement II : Humans also cause thermal pollution by altering vegetation cover and run-off patterns.
In the light of the above statements, choose the correct answer from the options given below:
Important Questions from Pollution
Which of the following is NOT a water pollutant?
________ is reducing the degree or intensity of, or eliminating, pollution.
Which of these can be a cause for soil erosion?
Which of the following is NOT a biodegradable waste?
“Green Muffler” is related to:
