Advertisements
Advertisements
Question
Explain why oil spills have an adverse effect on marine life.
Solution
Oil is lighter and insoluble in water and oil layer floats on the surface of water and prevents oxygen transfer from the atmosphere.
Oil leakage and petroleum products into sea water due to accidents of ships and oil tankers or leakage of pipe lines and storage tanks. They occur when oil is being produced from offshore well and may happen due to transportation by pipes and tanks, oil refineries, petrochemical plants, etc.
Damage caused by oil spills :
- Fish, birds, reptiles, and amphibians living in cannot breathe and die. The oil penetrates the bird's feathers and they cannot Toy, and affect their insulation and damages the reproductive system.
- It interrupts the food chain which may cause the extinction of species.
APPEARS IN
RELATED QUESTIONS
The solubility of a gas in water.............. with rise in temperature and.......................with rise in pressure.
Match the statements in column A with that in column B.
| Column A | Column B |
| (a) deliquescent substance | (1) sodium bicarbonate |
| (b) hygroscopic substance | (2) magnesium chloride |
| (c) efflorestance substance | (3) conc. sulphuric acid |
| (d) substance causing temporary hardness | (4) washing soda |
Explain why:
Table salts become sticky on exposure to humid air during the rainy season.
What do you understand by permanent hardness?
Name a deliquescent substance’.
What is meant by the term ‘offshore drilling’. State the main environmental effects of offshore drilling.
Select the correct word from the words in option to complete the sentence:
If pressure on the surface of water increases its boiling point ____ and freezing point ____.
Select the correct word from the words in option to complete the sentence:
Dissolved air in water contains a ____ percentage of oxygen than ordinary air.
Water levels in rivers increase greatly during ______.
How is the life of organisms living in water affected when water gets polluted?
