The water pollution in river is measured by the dissolved amount of

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Q: 102 (IAS/1998)
The water pollution in river is measured by the dissolved amount of

question_subject: 

Science

question_exam: 

IAS

stats: 

0,130,66,29,14,23,130

keywords: 

{'water pollution': [2, 2, 0, 0], 'river': [4, 0, 1, 2], 'ozone': [3, 0, 3, 5], 'chlorine': [8, 2, 8, 9], 'oxygen': [3, 0, 1, 0], 'nitrogen': [1, 1, 0, 2]}