Here you will find NCERT MCQ Questions for Class 7 science with Answers PDF Free Download based on the important concepts and topics given in the textbook as per CBSE new exam pattern. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Class 7 science. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.
Q1. In sewerage manholes are located at every
(a) 20-25 m
(b) 50-60 m
(c) 90-100 m
(d) 100-110 m
Answer: (b) 50-60 m
Q2. Excreta from the toilet seats flow through covered drains into a chemicals:
(a) chemicals
(b) biogas plant
(c) vermi-processing toilets
(d) none of these
Answer: (b) biogas plant
Q3. Sanitation in the cities is the function of
(a) Municipal corporation
(b) Non-government organisation
(c) Individual person
(d) Societies of locality
Answer: (a) Municipal corporation
Q4. The process of removing pollutants in water before it enter a water body is called
(a) cleaning of water
(b) refining
(c) filtering of water
(d) none of these
Answer: (a) cleaning of water
Q5. Which one of the following is a step in wastewater treatment?
(a) Aeration
(b) Filtration
(c) Chlorination
(d) All of these
Answer: (d) All of these
Q6. The biogas product is used as a source of:
(a) rains
(b) oils
(c) energy
(d) all of these
Answer: (c) energy
Q7. An example of source reduction of waste is
(a) Burning
(b) Making paper aero planes
(c) Throwing things that are old
(d) Backward composting
Answer: (d) Backward composting
Q8. Which of the following is a part of inorganic impurities of the sewage?
(a) Pesticides
(b) Urea
(c) Phosphates
(d) Vegetable waste
Answer: (c) Phosphates
Q9. Sludge in separate tanks is decomposed to get biogas by
(a) yeasts
(b) aerobic bacteria
(c) anaerobic bacteria
(d) none of these
Answer: (c) anaerobic bacteria
Q10. What helps to clean the clarified water:
(a) aerobic bacteria
(b) anaerobic bacteria
(c) both (a) and (b)
(d) none of these
Answer: (a) aerobic bacteria
Q11. Which of the following is wastewater?
(a) Water trickling from a damaged tap
(b) Water coming out of a shower
(c) Water flowing in a river
(d) Water coming out of a laundry
Answer: (d) Water coming out of a laundry
Q12. Water that is not fit for use is called
(a) clean water
(b) wastewater
(c) both (a) and (b)
(d) none of these
Answer: (b) wastewater
Q13. Which one of the following is a quality of wastewater?
(a) Foul smell
(b) Bad taste
(c) Dirty look
(d) All of these
Answer: (d) All of these
Q14. Untreated human excreta is a:
(a) waste water
(b) health hazard
(c) manure
(d) none of these
Answer: (b) health hazard
Q15. Which one is not a of household garbage
(a) Vegetable peels
(b) Dal packets
(c) Crockery pieces
(d) Cow dung
Answer: (d) Cow dung
Q16. Which of the following is not a source of wastewater?
(a) Sewers
(b) Homes
(c) Industries
(d) Hospitals
Answer: (a) Sewers
Q17. Period 2005-2015 is being celebrated as the international decade for action on
(a) water for life
(b) education for all
(c) global war
(d) terrorism
Answer: (a) water for life
Q18. Which process removes the solids like foeces and other substances from the waste water:
(a) chlorination
(b) decomposition
(c) evaporation
(d) sand and grit removal
Answer: (d) sand and grit removal
Q19. The process of waste treatment is called
(a) Water treatment
(b) Pollutant separation
(c) Sewage treatment
(d) Chlorination
Answer: (c) Sewage treatment
Q20. The period of International Decade for action on ‘Water for Life’ is
(a) 2000 – 2010
(b) 2005 – 2015
(c) 2010 – 2020
(d) 2003 – 2013
Answer: (b) 2005 – 2015
Class 7 Science MCQs Multiple Choice Questions with Answers
Chapter 1: Nutrition in Plants Class 7 MCQ
Chapter 2: Nutrition in Animals Class 7 MCQ
Chapter 3: Fibre to Fabric Class 7 MCQ
Chapter 4: Heat Class 7 MCQ
Chapter 5: Acids, Bases and Salts Class 7 MCQ
Chapter 6: Physical and Chemical Changes Class 7 MCQ
Chapter 7: Weather, Climate and Adaptations of Animals to Climate Class 7 MCQ
Chapter 8: Winds, Storms and Cyclones Class 7 MCQ
Chapter 9: Soil Class 7 MCQ
Chapter 10: Respiration in Organisms Class 7 MCQ Questions
Chapter 11: Transportation in Animals and Plants Class 7 MCQ Questions
Chapter 12: Reproduction in Plants Class 7 MCQ Questions
Chapter 13: Motion and Time Class 7 MCQ Questions
Chapter 14: Electric Current and Its Effects Class 7 MCQ Questions
Chapter 15: Light Class 7 MCQ Questions
Chapter 16: Water: A Precious Resource Class 7 MCQ Questions
Chapter 17: Forests: Our Lifeline Class 7 MCQ Questions
Chapter 18: Wastewater Story Class 7 MCQ Questions
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