Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 General Science Chemistry Chemical Bond and Molecular Structure
The rusting of iron is a process where the iron reacts with oxygen to form rust. Chemically the reaction may be written as:
a Fe + b O2 + → c Fe2O3.
In the balanced chemical reaction, the coefficient of Fe ‘a’ is:1
2
2
3
3
4
4
5