Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Basic Concepts of Chemistry
A metal X does not liberate hydrogen with acid but form green corrosion in air.
1
Fe
2
Mg
3
Cu
4
More than one of the above
5
None of the above