defence exam Indian Army Nursing Assistant Mock Test Series 2025 General Science Chemistry Chemical Reaction
Among the following reaction of hydrogen with halogens, the one that requires a catalyst is
1
H2 + Cl2 → 2HCl
2
H2 + I2 → 2HI
3
H2 + F2 → 2HF
4
H2 + Br2 → 2HBr