Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Basic Concepts of Chemistry
In which one of the following chemical equations is the Law of Conservation of mass violated?
1
2C2H6(g) + 6O2 → 4CO2(g) + 6H2O
2
2Fe(S) + 3H2O(g) → Fe2O3(s) + 3H2
3
2Na(S) + 2H2O → 2NaOH + H2(g)
4
More than one of the above
5
None of the above