Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Equilibrium
The pH of fresh groundwater slightly decrease upon exposure to air because-
1
Carbon dioxide from air is dissolved in the water
2
Oxygen from air is dissolved in the water
3
The dissolved carbon dioxide of the ground water escapes into air
4
More than one of the above
5
None of the above