This set of Environmental Science Multiple Choice Questions & Answers (MCQs) focuses on “Acid Rain”.
1. Below which of the following pH is rain regarded as ‘acid rain’?
Explanation: Though the pH of neutral water is 7, rain water is acidic due to mixing up with atmospheric carbon dioxide and is said to have a 5.6 pH. Hence acid rain has a pH less than 5.6.
2. Glass containers are generally not preferred for sampling rain water. Why?
a) Glass containers are expensive
b) Glass containers are not easy to maintain
c) Glass containers affect the pH of the rain water
d) All of the mentioned
Explanation: Glass containers can alter the pH of the rain water and hence not suitable to use for sampling rain water.
3. Which of the following gases are main contributors to acid rain?
a) Carbon dioxide and carbon monoxide
b) Sulphur dioxide and carbon dioxide
c) Sulphur dioxide and nitrogen dioxide
d) Sulphur dioxide and nitrous oxide
Explanation: Sulphur dioxide and nitrogen dioxide have a high tendency to mix with water to form sulphurous/sulphuric acid and nitric acid.
4. What does the term “liming” mean?
a) Application of magnesium and calcium rich substances to soil
b) Erosion of calcium carbonate(lime) zones in soil
c) Excessive growth of lemon trees in acid rain prone regions
d) None of the mentioned
Explanation: Liming is done to neutralise soils that become acidic due to excessive acidic rainfall, but is known to have harmful impact on plant life.
5. Which place in India receives the highest annual rainfall?
Explanation: Mawsynram currently holds the record for the highest annual rainfall (11.873 km) in our country.
6. Who discovered the phenomenon of acid rain?
a) George Brown
b) James T. Stewart
c) Robert Angus Smith
d) Charles David
Explanation: The phenomenon of acid rain was discovered by Robert A. Smith during the industrial revolution.
7. Which of the following is/are natural contributor(s) to sulphur dioxide in the atmosphere?
a) Sea sprays
b) All of the mentioned
c) Decaying vegetation
d) Volcanic eruption
Explanation: Though primary natural contributor to sulphur dioxide is volcanic eruptions, even sea sprays and decaying vegetation release sulphur dioxide to the atmosphere.
8. What is the pH required for the survival of aquatic animals and plants?
Explanation: Aquatic organisms require a moderately acidic pH of 4.8 and if it goes below this level, it proves to be detrimental to their survival.
9. The acidic air pollutants reach the Earth’s surface because of wet deposition only.
Explanation: The acidic air pollutions get deposited on the Earth’s surface due to both wet and dry deposition. Wet deposition occurs due to rain fall and moist weather, whereas dry deposition occurs due to mixing of acidic pollutants and dust.
10. Which of the following gases is responsible for the yellowing of the Taj Mahal?
a) Organic carbon
b) Black carbon
c) Brown carbon
d) All of the mentioned
Explanation: Organic carbon, black carbon and brown carbon (generated due to biomass combustion) are light absorbing particles responsible for the yellowing of Taj Mahal.
Sanfoundry Global Education & Learning Series – Environmental Science.
To practice all areas of Environmental Science, here is complete set of 1000+ Multiple Choice Questions and Answers.