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Chemistry

Chemistry
The 'solid waste' is also known as

Sludge
Sedge
Scrubber
Toxic waste

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Chemistry
Maximum permissible concentration of total hardness in drinking water is

100
500
200
50

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Chemistry
The advantage of detergents over soaps is

Soaps give lather with only soft water
Detergents could not give much lather
Detergents are soluble in water
Detergents give lather even with hard water

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Chemistry
Milk tastes sour when it is left in open for some time. This happens due to the formation of

Carbonic acid
Acetic acid
Lactic acid
Citric acid

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Chemistry
The components of water can be separated by

Physical methods
Chemical methods
Both A and B
They can not be separated

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Chemistry
The electronic configuration of an atom having atomic number ‘20’ is

2, 8, 10
2, 10, 8
2, 6, 8, 4
2, 8, 8, 2

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