Biodegradable pollutant is:_____________?
Correct answer: C. Domestic waste
- A. DDT
- B. mercury salt
- C. Domestic waste
- D. Aluminum foil
Explanation
Domestic waste contains biodegradable materials such as food residues and paper that microorganisms can decompose. DDT, mercury salts and aluminium foil are persistent or non-biodegradable pollutants. The likely wrong choice is DDT because it is a familiar pollutant, but its persistence prevents normal biodegradation.
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About Properties of Liquids
Liquid behavior depends on intermolecular forces, which produce surface tension, viscosity, capillary action and a definite volume without a fixed shape. The topic also covers vapor pressure, evaporation, boiling point and the effect of temperature and external pressure, while distinguishing evaporation at the surface from boiling throughout the liquid.
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