Advertisements
Advertisements
प्रश्न
Why should we not throw cooking oil and fats down the drain?
Advertisements
उत्तर
Cooking oil and fats should not be disposed of off down the drains as these get harden and block pipes. They reduce the flow of water and result in stagnant water, which provides a breeding ground for mosquitoes and flies and spreads infectious diseases.
APPEARS IN
संबंधित प्रश्न
Give reason On opening a bottle of a cold drink, a fizz sound is heard.
Name the gas produced when chlorine is dissolved in water and exposed to sunlight.
Give reason of Alcohol is mixed with water and is used in car radiator.
Give reason of Icebergs float on ocean water.
How are natural springs of water formed ?
What will happen if the total supply of potable water is finished?
Give a balanced equation for the following conversion:
Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate.
Give a balanced equation for the following conversion:
Magnesium bicarbonate in temporary hard water to magnesium carbonate by boiling.
Give reason for the following:
The percentage of oxygen, in air dissolved in water, is higher than the percentage of oxygen in ordinary air.
State the meaning of the term ‘water pollution’. State how you would find out, the different sources of pollution of water bodies in the locality.
Name one substance which is ‘deliquescent’.
Explain why oil spills have an adverse effect on marine life.
Explain any two environmental impacts of an ‘oil spill’.
Give a reason for the following:
Efflorescence is minimum during humid conditions.
________ of water is in oceans and seas.
A jumbled word is given here. Write the correct form of the word.
CHARREGE
From where do the following usually get water? In which form is water present in them?
Aquifer
Pick from the following one chemical used to disinfect water.
Match the items of Column I with the items of Column II with reference to sewage.
| Column I | Column II | ||
| (a) | Inorganic impurities | (i) | phosphorus and nitrogen |
| (b) | Organic impurities | (ii) | nitrates and phosphates |
| (c) | Nutrients | (iii) | cholera and typhoid |
| (d) | Bacteria | (iv) | pesticides and herbicides |
Why is there a need for conserving water? Give two reasons.
