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UPSC 1998: The water pollution in river is measured by the dissolved amount of
(a)Chlorine
(b)Ozone
(c)Nitrogen
(d)Oxygen
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Not attemptedCorrect Answer: (d) Oxygen
River water quality is commonly assessed by measuring the concentration of dissolved oxygen (DO); low DO indicates high organic pollution and poor aquatic life support. Chlorine, ozone and nitrogen are not standard primary indicators of riverine pollution levels. ([scribd.com](https://www.scribd.com/document/731910048/1998?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 1998 Environment & Ecology question?▼
The correct answer is option (d): Oxygen. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Water & Wetland Conservation question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1998, GS Paper 1, as Question 102. It falls under Environment & Ecology > Water & Wetland Conservation.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Water & Wetland Conservation?▼
UPSC has asked 20 questions from Water & Wetland Conservation (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.