Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Chemical Reaction
Which of the following statements is correct?
1
Zinc oxide is a form of rust.
2
Copper can also turn into rust upon hydration.
3
Chemically rust is hydrated ferric oxide.
4
More than one of the above
5
None of the above