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