Here are 10 One-Word Answer Type Questions from the subtopic “What is Sewage?” (from your uploaded PDF) with their answers and explanations (given immediately after each question and answer as you requested):
1)
Question: What is the liquid waste released from houses and other places called?
Answer: Sewage
Explanation: Sewage is wastewater released by homes, offices, industries, hospitals, and rainwater running off streets. It contains dissolved and suspended impurities.
2)
Question: What is the primary component of sewage?
Answer: Water
Explanation: Most of sewage is water, around 99%, and the rest is impurities like organic and inorganic substances, microbes, and nutrients.
3)
Question: Name one organic impurity present in sewage.
Answer: Urea
Explanation: Organic impurities in sewage include human faeces, animal waste, urea, oils, pesticides, and vegetable waste which cause pollution if untreated.
4)
Question: Which inorganic impurity is commonly found in sewage?
Answer: Nitrate
Explanation: Inorganic impurities like nitrates, phosphates, and metals are dissolved in sewage and can cause water pollution and harm aquatic life.
5)
Question: Which disease-causing bacteria is present in sewage?
Answer: Vibrio
Explanation: Vibrio cholerae is a harmful bacteria found in sewage which can cause cholera if untreated sewage mixes with drinking water sources.
6)
Question: What is the term used for microscopic organisms found in sewage?
Answer: Microbes
Explanation: Sewage contains many microbes like bacteria, protozoa, and viruses that can spread diseases such as dysentery and typhoid.
7)
Question: What is the term used for nutrients like nitrogen and phosphorus in sewage?
Answer: Nutrients
Explanation: Sewage contains nutrients like nitrogen and phosphorus which can cause excessive growth of algae in water bodies leading to pollution.
8)
Question: What is the term for a pipe that carries sewage?
Answer: Sewer
Explanation: A sewer is a pipeline that transports sewage from houses and buildings to treatment plants or disposal sites.
9)
Question: What is the term for the network of pipes carrying sewage?
Answer: Sewerage
Explanation: Sewerage is the system of pipes that collects and carries sewage from different places to a treatment plant.
10)
Question: Name one harmful effect of untreated sewage.
Answer: Pollution
Explanation: If sewage is discharged untreated into rivers or seas, it causes water pollution, spreads diseases, and harms aquatic life.
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