Ncert- science – class 7-Chapter 13 – Wastewater Story 2 Welcome to your Ncert- science – class 7-Chapter 13 – Wastewater Story 2 1. Chlorine tablet is used to remove .......... from waste water. Odour All of the above Dark colour Bacteria None 2. What is the main cause of pollution of water in India? Both Discharge of untreated sewage and Discharge of industrial waste Discharge of industrial waste Bathing Discharge of untreated sewage None 3. Identify the best way to conserve water at home. All of the above Fixing leaky faucets Turn off tap while brushing teeth Installation of rain barrel None 4. Atul is traveling from Mumbai to Nagpur by train, in between, he felt uneasy because He was already sick. None of the above. He used the properly sanitized public toilet. He used an improperly sanitized public toilet. None 5. Which of the following is associated with the vermi-processing toilets? Low water use toilet Electronic toilet Kid's toilet None of the above None 6. Drains get blocked by : Chemicals and water. Oil and tea leaves. Oil and chemicals. Chemicals and soil. None 7. The soil pores block and become ineffective in filtering the water due to Disposal of oil in garden. Disposal of oil in drainage pipe. None of the above. Disposal of oil in open drain. None 8. Pollution due to sewage can be reduced by Letting off drainage in rivers. Creating separate chemical toilets. Both Creating separate chemical toilets. AndConstructing septic tanks. Constructing septic tanks. None 9. The disease caused due to improper sanitation in public place is Endemic Pandemic None of the above. Non-communicable None 10. Cooking oil should not be thrown down the drain because They block the drainage pipes. They do not allow free flow of oxygen. They do not allow bacteria to decompose waste. None 11. In which of the following process, human excreta is completely converted to vermi cakes Vermi-processing toilets Sewage treatment Biogas production Vermicomposting None 12. Which of the following happens when the garbage in dumped into the rivers? Water becomes unfit for drinking Fishes and water plants die The inlets and ground water sources are blocked All of the above None 13. A disease can spread from one person to population by Sharing of food. Improper sanitation in public places. Sharing of water bottle. Improper sanitation in home. None 14. Black brown water that goes down the drain from sink is called as sewage water Septic water All of the above Wastewater None 15. Sanitation at public places can be maintained by Sufficient public toilet facilities. All of the above. Proper drainage. Garbage management. None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
