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Federal (FBISE) · Chapter test · Free

9th Class Chemistry Chapter 12 Test12. Environmental Chemistry- Water

28 marks · 40 minutes · 19 questions. Covers: 12. Environmental Chemistry- Water.

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9th Class Chemistry Chapter 12 Test

9th Class · Chemistry · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 28Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 8 × 1 = 8)

  1. What is eutrophication caused by?
    1. low phosphate concentration
    2. high concentration
    3. increase water flow
    4. improved water clarity
  2. What is a commonly application of tap water in a chemistry laboratory?
    1. preparing chemical reagents
    2. calibration of sensors
    3. cleaning glasswater
    4. measuring pH level
  3. What process is used to purify water to produce distilled water?
    1. filtration
    2. distillation
    3. reverse osmosis
    4. sedimentation
  4. What harmfull substances can wastewater carry?
    1. only minerals
    2. pathogens,bacteria
    3. pure water
    4. oxygen
  5. What role do essential minerals in natural water play?
    1. they decreasen enzyme activity
    2. they provide necessary elements for biological processes
    3. they make water undrinkable
    4. they cause water to become more acidic
  6. Where do fish and other marine life get their oxygen?
    1. From air bubbles
    2. From dissolved
    3. From food
    4. From sunlight
  7. What can household waste containing detergents do to aquatic life?
    1. improve water quality
    2. enhance fish growth
    3. cause the death of aquatic life
    4. increase water clarity
  8. What types of harmfull microbes can be found in natural water sources?
    1. only bacteria
    2. only viruses
    3. bacteria.viruses
    4. only parasites

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. Volume of liquid in cylinder is:
    1. 23
    2. 24
    3. 25
    4. 22
  2. What are the main benefits of natural substance found in water?
  3. Ethanoic acid contains functional group:
    1. –OH
    2. –CO–
    3. –COOH
    4. –CHO
  4. Write any three steps of properties of water?
  5. Which foods are rich in fats?
    1. Rice & maize
    2. Pulses & wheat
    3. Milk, egg & beans
    4. Cheese, butter & oil
  6. Weak immunity due to lack of which nutrient?
    1. Amino acids
    2. Carbohydrates
    3. Proteins
    4. Lipids
  7. It is advisable to wash hands well with soap after using bathrooms. Evaluate it.
  8. Which product is obtained when chloromethane is reduced?
    1. Ethane
    2. Ethene
    3. Methane
    4. Ethyne

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. Write the disadvantages of natural substances found in water?
  2. Define and Explain Fertilizer?
  3. Distinguish between distilled water and tap water with their applications in practical chemistry.