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? Water becomes unfit for drinking All of the above Fishes and water plants die The inlets and ground water sources are blocked None 2. Atul is traveling from Mumbai to Nagpur by train, in between, he felt uneasy because None of the above. He used the properly sanitized public toilet. He used an improperly sanitized public toilet. He was already sick. None 3. 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 4. Chlorine tablet is used to remove .......... from waste water. Odour Dark colour Bacteria All of the above None 5. Black brown water that goes down the drain from sink is called as Wastewater Septic water All of the above sewage water None 6. Sanitation at public places can be maintained by Sufficient public toilet facilities. Garbage management. All of the above. Proper drainage. None 7. 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 8. Pollution due to sewage can be reduced by Constructing septic tanks. Both Creating separate chemical toilets. AndConstructing septic tanks. Letting off drainage in rivers. Creating separate chemical toilets. None 9. The soil pores block and become ineffective in filtering the water due to Disposal of oil in open drain. Disposal of oil in garden. Disposal of oil in drainage pipe. None of the above. None 10. The disease caused due to improper sanitation in public place is Pandemic None of the above. Endemic Non-communicable None 11. Drains get blocked by : Chemicals and soil. Chemicals and water. Oil and chemicals. Oil and tea leaves. None 12. 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 13. In which of the following process, human excreta is completely converted to vermi cakes Vermi-processing toilets Vermicomposting Biogas production Sewage treatment None 14. 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 15. A disease can spread from one person to population by Improper sanitation in home. Improper sanitation in public places. Sharing of food. Sharing of water bottle. 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.
