Teaching Rajasthan 3rd Grade REET Mains (Level I & II) Mock Test General Science Chemistry Equilibrium

एक आदर्श अम्ल वर्षा का pH _____ है।

1

7 - 6·6

2

6·6 - 6

3

< 5·6

4

इनमें से कोई भी नहीं

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