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प्रश्न
Name two factors which can be used to find whether river water has been contaminated.
उत्तर
Presence of coliform bacteria in the river water as well as the pH of the river can be used to find whether river water has been contaminated.
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संबंधित प्रश्न
Compare the above system with the probable systems in hilly/mountainous areas or plains or plateau regions
Mention any two objectives of rainwater harvesting.
Name the most common practice of recharging ground water.
State the advantages of constructing dams across the rivers.
What are the various advantages of water stored in ground?
The main reason for the abundant coliform bacteria in the water of river Ganga is :
(a) immersion of ashes of the dead into the river
(b) washing of clothes on the banks of river
(c) discharge of industrial wastes into river water
(d) disposal of unburnt corpses into river water
The pH of a sample of water collected from a river is found to be in the range of 3.5 to 4.5. The most likely reason for this is the waste being discharged into the river from a :
(a) soap and detergent manufacturing factory
(b) car battery manufacturing factory
(c) alcohol manufacturing factory
(d) plastic cups moulding factory
If the total water on earth be 100% the percentage of freshwater is ______.
The jumbled word is given here. Write the correct form of each word.
WASHFERRET
Point out the importance of water conservation.
