Question : Which method will be employed to test the hardness of water?
Option 1: Boiling
Option 2: Distillation
Option 3: Formation of lather with soap
Option 4: None of these
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Correct Answer: Formation of lather with soap
Solution : The correct option is the Formation of lather with soap.
To determine the hardness of water, the lather or soap test is widely employed. Hard water combines with soap to generate soap scum or curd, an intractable material. When you use soap in hard water, it produces less lather and instead forms a scum. This can make cleaning harder, as more soap is needed to produce the desired cleansing effect. Soft water, on the other hand, readily forms a lather with soap.
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Question : The advantge of detergents over soaps is :
Option 1: Detergents are soluble in water
Option 2: Detergents could not give much lather
Option 3: Dtergents give lather even with hard water
Option 4: Soapes give lather with only soft water
Question : Operation flood is related to
Option 1: Flood control
Option 2: Arrangement of drinking water
Option 3: Milk production
Question : Identify the water harvesting system in the Western Himalayas.
Option 1: Khadins
Option 2: Johads
Option 3: None of these
Option 4: Guls
Question : Hydraulic Action is a type of erosion caused by
Option 1: Running water
Option 2: Wind
Option 3: Glacier
Option 4: None of these.
Question : The boiling point of water depends upon the:
Option 1: atmospheric pressure
Option 2: volume
Option 3: density
Option 4: mass
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