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प्रश्न
Rain is called acid rain when it:
विकल्प
pH falls below 7
pH falls below 6
pH falls below 5.6
pH is above 7
MCQ
उत्तर
pH falls below 5.6
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
Rain is called acid rain when it:
pH falls below 7
pH falls below 6
pH falls below 5.6
pH is above 7
pH falls below 5.6