What happens when (i) sodium metal is dropped in water

s-blockelements
cbse

#1

What happens when (i) sodium metal is dropped in water, (ii) sodium metal is heated in free supply of air, (iii) sodium peroxide dissolves in water


#2

(i) When sodium metal is dropped in water, hydrogen gas in liberated. Due to extreme heat released as the reaction is exothermic, ${{H}{2}}$ gas catches fire.
2Na + 2${{H}
{2}}$O ------>2NaOH + ${{H}{2}}$
(ii) When sodium metal is heated in free supply of air or oxygen, it burns forming sodium peroxide and some super oxide (Na${{O)}
{2}}$)

(iii) When sodium peroxide is dissolved in water, it gives ${{H}{2}}$${{O}{2}}$