ICSE Class 10

General instructions: Answer all questions. Marks are shown in brackets [ ].

Objective

1. 1.
   Many nuclear power plants are constructed near water sources. They use water for cooling their machinery and release it back into the water stream. Identify the kind of pollution caused.

   1. a. Radiation pollution
   2. b. Water pollution
   3. c. Industrial pollution
   4. d. Thermal pollution
   [1]
2. 2.
   Rubber particles and dust raised by running motor vehicles are examples of which type of pollutants?

   1. A. gaseous pollutants
   2. B. particulate pollutants
   3. C. chemical pollutants
   4. D. biodegradable pollutants
   [1]
3. 3.
   Which one is non-biodegradable?

   1. A. DDT
   2. B. Vegetable peels
   3. C. Livestock waste
   4. D. Sewage
   [1]
4. 4.
   Which of the following is a non-biodegradable pollutant?

   1. A. Paper
   2. B. Wood
   3. C. Cloth
   4. D. DDT
   [1]
5. 5.
   Which of the following is NOT an effect of noise pollution?

   1. A. Prolonged exposure above 80dB damages the eardrum
   2. B. Disturbs sleep, leading to nervous disorders
   3. C. Causes acid rain and respiratory diseases
   4. D. Disturbs birds and wildlife
   [1]
6. 6.
   Name the chemical element which caused Minamata disease in Japan.

   1. A. Lead (Pb)
   2. B. Mercury (Hg)
   3. C. Arsenic (As)
   4. D. Cadmium (Cd)
   [1]
7. 7.
   Which of the following is NOT a harmful effect of acid rain?

   1. A. Damage to vegetation and crops due to soil acidification.
   2. B. Erosion of ancient monuments, statues, and sculptures.
   3. C. Improvement of marine life due to increased water pH.
   4. D. Degradation of visibility and harm to human respiratory health.
   [1]
8. 8.
   An increased rate of greenhouse gases causes

   1. A. Depletion of ozone layer
   2. B. Global warming
   3. C. Eutrophication
   4. D. Algal bloom
   [1]
9. 9.
   Which of the following is a set of four effective ways to control vehicular air pollution?

   1. A. Use of efficient engines, good quality automobile fuels, lead-free petrol, and greater use of compressed natural gas (CNG).
   2. B. Increasing vehicle speed limits, using diesel fuels, reducing public transport, and promoting electric bikes.
   3. C. Banning all vehicles, planting more trees, using coal-based fuels, and installing catalytic converters.
   4. D. Reducing engine size, using leaded petrol, promoting hydrogen fuels, and increasing vehicle taxes.
   [1]
10. 10.
    What is a qualitative pollutant?

    1. A. CO₂
    2. B. Dust
    3. C. Pesticides
    4. D. Water vapor
    [1]
11. 11.
    A science teacher asked her students to give two examples of greenhouse gases. Rohit said: Carbon dioxide and Methane. Sara said: Nitrogen and Oxygen. Vikas said: Water vapor and Methane. Nina said: Carbon monoxide and Ozone. Who were correct?

    1. A. Rohit and Sara
    2. B. Rohit and Vikas
    3. C. Vikas and Nina
    4. D. Sara and Nina
    [1]
12. 12.
    Which of the following correctly lists two degradable and two non-degradable medical wastes released from hospitals?

    1. A. Degradable: dirty dressings, unused discarded medicinal tablets; Non-degradable: needles, syringes
    2. B. Degradable: plastic gloves, cotton swabs; Non-degradable: glass vials, metal instruments
    3. C. Degradable: paper waste, food scraps; Non-degradable: dirty dressings, syringes
    4. D. Degradable: needles, unused medicinal tablets; Non-degradable: dirty dressings, plastic waste
    [1]
13. 13.
    Eutrophication leads to death of fish due to

    1. A. Increased O₃ content
    2. B. Increased algal content
    3. C. Decreased algal content
    4. D. Decreased O₂ content
    [1]
14. 14.
    Which among the following diseases is caused by water pollution?

    1. A. Measles
    2. B. Tuberculosis
    3. C. Typhoid
    4. D. Haemophilia
    [1]
15. 15.
    Which of the following best describes quantitative pollutants?

    1. A. Pollutants that are harmful regardless of their concentration.
    2. B. Ingredients that become pollutants when their concentration exceeds a threshold value, e.g., CO, CO₂.
    3. C. Pollutants that are only harmful in solid form.
    4. D. Substances that improve air quality when present in large amounts.
    [1]
16. 16.
    The biology teacher asked her students to name two examples of renewable energy sources. Kiran said : Wind energy and Solar energy. Anu said : Coal and Natural gas. Pooja said : Solar energy and Hydroelectric power. Ravi said : Petroleum and Wind energy. Who were correct?

    1. A. Kiran and Anu
    2. B. Anu and Ravi
    3. C. Kiran and Pooja
    4. D. Pooja and Ravi
    [1]
17. 17.
    Meena is studying greenhouse gases and learns that certain gases trap heat in the Earth's atmosphere, contributing to the greenhouse effect and global warming. Which among the following is the main cause of ozone depletion?

    1. A. Sulphur dioxide
    2. B. Carbon dioxide
    3. C. Nitrogen dioxide
    4. D. CFCs
    [1]
18. 18.
    Pollutants that can be decomposed by microorganisms are classified as what?

    1. A. Non-biodegradable
    2. B. Biodegradable
    3. C. Toxic
    4. D. Synthetic
    [1]
19. 19.
    If DDT is sprayed in a lake, its highest concentration will be found in

    1. A. Phytoplanktons
    2. B. Zooplanktons
    3. C. Fishes
    4. D. Fish eating birds
    [1]
20. 20.
    Which of the following best describes sewage and the primary environmental consequence of discharging untreated sewage into a river?

    1. A. Sewage is industrial waste only, and it increases river oxygen levels.
    2. B. Sewage is liquid waste from household activities, and it reduces river oxygen due to algal bloom.
    3. C. Sewage is solid waste from agriculture, and it causes soil erosion in rivers.
    4. D. Sewage is rainwater runoff, and it has no effect on river ecosystems.
    [1]