Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Basic Concepts of Chemistry
Zinc is used to protect iron from corrosion because zinc is
1
more electropositive than iron
2
cheaper than iron
3
a bluish white metal
4
More than one of the above
5
None of the above