Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) 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