Advertisements
Advertisements
प्रश्न
State whether the following statement is True or False. If false, give the correct statement.
51% of the earth’s surface is covered with water
विकल्प
True
False
Advertisements
उत्तर
This statement is False.
Explanation:
71% of the earth’s surface is covered with water.
APPEARS IN
संबंधित प्रश्न
State the importance of water cycle in nature.
Name the two gases from which water is formed. What is the chemical composition of these two gases in water ?
Give reason for Silica gel pouches are kept in unused water bottle.
The solubility of a gas in water.............. with rise in temperature and.......................with rise in pressure.
Use of excessive .................... by farmers causes water pollution.
Give one word for the following statement :
The change of states of water from one form to another .
Give one word for the following statement:
A mixture of common salt and ice .
Explain rain water harvesting.
Explain why:
Water is an excellent liquid to use in cooling systems.
What are stalgmites and stalactites? How are they formed?
The water in a lake is called ground water.
Define ‘eutrophication’.
State any two sources of water pollution.
Name or state the following:
A deliquescent salt of a trivalent metal.
Sea water can be used for irrigation as such.
On which of the following day is World Water Day observed?
In a filtration, plant water is filtered using layers of
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 |
