1st Year Chemistry Chapter 14 Test14. Environmental Chemistry-Water

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. What is the main effect of crude oil leakage on the surface of water bodies?
   1. It increases light penetration
   2. It promotes aeration and plant growth
   3. It forms a black layer, blocking air and light from entering the water
   4. It adds essential nutrients for fish
2. Water is called a universal solvent mainly because of its:
   1. Low density
   2. Polarity and hydrogen bonding
   3. High temperature
   4. Lack of solubility
3. Which step involves cooperation among countries for sustainable water use?
   1. Water recycling
   2. Desalination
   3. Smart use of water
   4. International cooperation
4. Which human activity is the largest consumer of freshwater, placing stress on local water supplies?
   1. Industrialization
   2. Deforestation
   3. Agricultural development
   4. Mining
5. Nonpoint sources of water pollution are widespread and occur mainly due to which of the following?
   1. Oil cargo ship leakages
   2. Discharge from treatment plants
   3. Seepage or runoff carrying pollutants from various places
   4. Accidental leaks during offshore exploration
6. The first step in cleaning raw water, which removes large debris like sticks, leaves, and pebbles, is called:
   1. Coagulation
   2. Filtration
   3. Screening
   4. Disinfection
7. Which of the following diseases is not directly associated with contaminated water and poor sanitation?
   1. Cholera
   2. Polio
   3. Malaria
   4. Dysentery
8. In which method of the following the small particles are coagulated into big particles and then separated?
   1. Filteration
   2. Coagulation
   3. Sedimentation
   4. Chlorination
9. Which method encourages efficient use of water in homes, industries, and agriculture?
   1. Deforestation
   2. Smart use of water
   3. Water discharge
   4. Over-irrigation
10. Which of the following represents a point source of water pollution?
    1. Runoff of fertilizers from a field
    2. Effluents discharged from an industry
    3. Residential effluents like detergents
    4. Construction-related pollutants