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UPSC 1996: Physico-chemical characteristics of water in water sources undergo changes due to
(a)aquatic macrophytes
(b)aquatic fungi
(c)effluents
(d)evapotranspiration
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Not attemptedCorrect Answer: (c) effluents
Industrial and domestic effluents alter temperature, pH, dissolved oxygen and chemical composition of natural waters, making them the prime cause of physico-chemical changes in water bodies, unlike biotic factors or evapotranspiration which have limited impact. ([licchavilyceum.com](https://licchavilyceum.com/upsc-civil-services-prelims-1996-solved-question-paper/))
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Frequently Asked Questions
What is the correct answer to this UPSC 1996 Environment & Ecology question?▼
The correct answer is option (c): effluents. 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 1996, GS Paper 1, as Question 106. 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.