Noise and Soil Pollution
Telangana Open School (TOSS) · Class 12 · Chemistry
Flashcards for Noise and Soil Pollution — Telangana Open School (TOSS) Class 12 Chemistry. Quick Q&A cards covering key concepts, definitions, and formulas.
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Define noise pollution.
Answer
Noise pollution is any unwanted sound with intensity more than 65 decibels (dB). It causes health issues like stress, hearing loss, and sleep disturbances.
What is the unit used to measure sound intensity?
Answer
The unit used to measure sound intensity is the decibel (dB). For example, a quiet room is about 20 dB, while a truck horn can reach 110 dB.
List four sources of noise pollution.
Answer
1. Vehicles (traffic and horns) 2. Industrial machinery 3. Construction activities 4. Festivals and weddings with loud music (e.g., DJ systems)…
What are the health effects of prolonged exposure to noise above 70 dB?
Answer
Prolonged exposure to noise above 70 dB can cause: stress, high blood pressure, hearing loss (Noise Induced Hearing Loss), disturbed sleep, and reduced productivity.
What is the permissible noise level in silence zones?
Answer
In silence zones (within 100 meters of hospitals, schools, courts), the permissible noise level is 50 dB. Honking, loudspeakers, and bursting crackers are prohibited.
Define soil pollution.
Answer
Soil pollution is the contamination of soil by harmful substances such as toxic metals, pesticides, fertilizers, or industrial waste, altering its natural composition and harming ecosystems.
Give two natural sources of soil pollution.
Answer
1. Rain deposits contaminants into soil. 2. Thunderstorms can form perchlorate ions in soils containing chlorine and metal ions.
List five anthropogenic (man-made) sources of soil pollution.
Answer
1. Excessive use of pesticides and fertilizers 2. Mining activities (releases heavy metals) 3. Industrial waste dumping 4. Oil spillage during transport 5. Improper disposal of sewage and plastics…
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