Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) People Development & Environment Environmental Issues Pollution

वर्षा को अम्लीय वर्षा के रूप में जाना जाता है जब इसका pH मान ______ होता है। 

1
1 - 3
2
5.6 से कम 
3
5.6 - 7.0
4
7 से अधिक 
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