KVPY SA Exam 2014 Question Paper

Question : 80 of 80

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Two bottles were half filled with water from Ganga (‘P’) and Kaveri (‘Q’) and kept under identical airtight conditions for 5 days. The oxygen was determined to be 2 % in bottle (‘P’) and 10 % in bottle (‘Q’). What could be the cause of this difference?

Ganga is more polluted than Kaveri
Both the rivers are equally polluted
Kaveri is more polluted than Ganga
Kaveri has more minerals than Ganga

Validate

Solution:

Ganga is more polluted than Kaveri
→ lower DO [Dissolved Oxygen] indicates polluted water

DO\{ \table 2% → \Ganga \water (P),;10% → \Kaveri \water (Q)

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