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What happens when (i) Sodium metal is dr...

What happens when (i) Sodium metal is dropped in water (ii) Sodium metal is heated in a free supply of air? Iii) Sodium peroxide dissolves in water?

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i) Sodium metal when dropped in water it reacts with water vigorously and liberates `H_2` gas
`2Na+O_2 to 2NaOH+H_2`
(ii) Sodium metal is heated in free supply to air to form sodium peroxide.
`2Na+O_2 to Na_2O_2`
sodium peroxide
(iii) Sodium dissolves in water and forms NaOH and hydrogen peroxide.
`Na_2O_2 +2H_2O to 2NaOH+H_2O_2`
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