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1. Which gas is used to Kill bacteriain water?

September 20, 2025 by Admin

A. Hydrogen

B. Chlorine

C. Nitrogen

D. Sulphur

✅ The correct answer is option Chlorine.

Categories PastPaper 53, PPSC Past Papers Tags PastPaper 53, PPSC MCQs

9. The Boundary between Pakistan and Afghanistan is called:

2. The present Hijri year is:

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