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Class 7 Chemistry: Wastewater Story — Chapter Test 1

Class 7 • Chemistry • Wastewater Story • Chapter Test

MediumFREE

15

Questions

20 min

Duration

15

Marks (1 each)

No

Negative marking

Original practice questions with full solutions by ExamPortal.

Instructions

  • • Read each question carefully and pick the correct answer.
  • • You can mark questions for review and come back to them.
  • • Answers are saved automatically.
  • • The test is submitted automatically when time runs out.

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This test is completely free.

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SYLLABUS & QUESTION BLUEPRINT

Sample Practice Questions

Preview 5 sample questions from this 15-question test. Test your knowledge below or take the full exam in timed CBT mode.

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Question 1 of 15
Used water from homes and industries is called:
A
clean water
B
wastewater/sewage
C
rainwater
D
groundwater
View Correct Answer & Step-by-Step Solution
Correct Option:(B)wastewater/sewage

Detailed explanation is available inside the official test attempt review.

Question 2 of 15
A network of pipes that carries sewage is the:
A
drainage/sewerage system
B
water supply
C
canal
D
aqueduct
View Correct Answer & Step-by-Step Solution
Correct Option:(A)drainage/sewerage system

Detailed explanation is available inside the official test attempt review.

Question 3 of 15
A wastewater treatment plant (WWTP) cleans water by:
A
adding dirt
B
physical, chemical and biological processes
C
boiling only
D
freezing
View Correct Answer & Step-by-Step Solution
Correct Option:(B)physical, chemical and biological processes

Detailed explanation is available inside the official test attempt review.

Question 4 of 15
Solids that settle at the bottom during treatment are called:
A
scum
B
sludge
C
froth
D
foam
View Correct Answer & Step-by-Step Solution
Correct Option:(B)sludge

Detailed explanation is available inside the official test attempt review.

Question 5 of 15
Floating oil and grease removed during treatment is called:
A
sludge
B
scum
C
sediment
D
silt
View Correct Answer & Step-by-Step Solution
Correct Option:(B)scum

Detailed explanation is available inside the official test attempt review.

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Frequently asked questions

How many questions are there in Class 7 Chemistry: Wastewater Story — Chapter Test 1?

There are 15 questions to answer in 20 min. Each correct answer gives 1 mark, for a total of 15 marks.

Is there negative marking?

No. Wrong answers do not lose marks, so attempt every question.

Is this mock test free?

Yes, it is completely free. Just log in with your email to start.

What does this test cover?

It covers the chapter "Wastewater Story" of Class 7 Chemistry. All questions are original, with a full solution for each.

Will I see my result and the solutions?

Yes. Right after you submit you get your score, accuracy, rank and percentile, and you can review every question with the correct answer and a step-by-step explanation.

Can I take this test again?

Yes, you can retake it as many times as you like and compare your scores.