Question

What happens when hydrogen reacts with –

i. O₂ 

ii. Cl₂ 

iii. Na ?

Answer 1

i. 2 H₂ + O_2(g) → 2 H₂O_(I) – Water 

ii. H_2(g) + Cl_2(g) → 2 HCl_(g) – Hydrogen Chloride 

iii. 2 Na_(s) + H_2(g) → 2 NaH_(s) – Sodium hydride