Ncert- science – class 7-Chapter 13 – Wastewater Story 2 Welcome to your Ncert- science – class 7-Chapter 13 – Wastewater Story 2 1. What is the main cause of pollution of water in India? Discharge of untreated sewage Both Discharge of untreated sewage and Discharge of industrial waste Discharge of industrial waste Bathing None 2. Chlorine tablet is used to remove .......... from waste water. Dark colour Odour All of the above Bacteria None 3. Drains get blocked by : Oil and tea leaves. Chemicals and soil. Oil and chemicals. Chemicals and water. 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. A disease can spread from one person to population by Sharing of food. Sharing of water bottle. Improper sanitation in public places. Improper sanitation in home. None 6. Sanitation at public places can be maintained by All of the above. Proper drainage. Sufficient public toilet facilities. Garbage management. None 7. Identify the best way to conserve water at home. Installation of rain barrel Fixing leaky faucets All of the above Turn off tap while brushing teeth None 8. 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 9. Which of the following happens when the garbage in dumped into the rivers? Fishes and water plants die All of the above Water becomes unfit for drinking The inlets and ground water sources are blocked None 10. Black brown water that goes down the drain from sink is called as Wastewater All of the above Septic water sewage water None 11. Pollution due to sewage can be reduced by Constructing septic tanks. Creating separate chemical toilets. Both Creating separate chemical toilets. AndConstructing septic tanks. Letting off drainage in rivers. None 12. Which of the following is associated with the vermi-processing toilets? Low water use toilet Kid's toilet Electronic toilet None of the above None 13. 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 an improperly sanitized public toilet. He used the properly sanitized public toilet. None 14. The disease caused due to improper sanitation in public place is Non-communicable None of the above. Endemic Pandemic None 15. The soil pores block and become ineffective in filtering the water due to Disposal of oil in drainage pipe. Disposal of oil in garden. Disposal of oil in open drain. None of the above. 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.
