WB TET · Mathematics and Science (Paper II)
Composition, pollution and conservation of air and water.
Study notes are still being prepared.
Don't wait — Shishya can teach you this topic right now, on demand.
Ask Shishya to teach this →Shishya is your personal tutor for this topic. Pick a starter or open a free chat.
Q1 · Air and Water Quality · EASY
Which of the following gases is present in the highest percentage in the earth's atmosphere?
Q2 · Air and Water Quality · MEDIUM
A water sample was tested in a laboratory and found to contain harmful bacteria and dissolved salts. Which method would be most effective to make this water safe for drinking?
Q3 · Air and Water Quality · MEDIUM
In a certain city, the air quality index (AQI) shows high levels of suspended particulate matter (SPM). Which of the following is the most likely long-term health effect on the residents of this city?
Q4 · Air and Water Quality · HARD
A factory releases hot water at 60°C into a nearby river. The river water temperature rises from 25°C to 35°C within 500 meters downstream of the factory. Which of the following ecological consequences is most likely to occur in this affected stretch of the river?
Q5 · Air and Water Quality · EASY
Which gas present in the atmosphere is primarily responsible for the greenhouse effect?