Subject :NSO Class : Class 5
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 7
Ans 1:
Class : Class 7
Factories in general means "manufacturing units" so we can consider that the waste water which is thrown out can be acidic in nature.
Ans 2:
Class : Class 7
But it could be a washing factory in which soap water is thrown out. This will make soil basic.
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 9