Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Electrochemistry
Which one of the following correctly represents metals in decreasing order of reactivity?
1
Al > Zn > Fe > Cu
2
Cu> Fe> Zn > Al
3
Zn > Al > Cu > Fe
4
More than one of the above
5
None of the above