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Arrhenius Bases

wht happens w...

Question

wht happens when Na metal is dropped in water 2.Na is heated in presence of air 3.Na peroxide is dissolve in water

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Solution

1. Na in water displaces hydrogen from water alongwith heat. Due to this heat, evolved gas is burnt. Hence, Na catches fire in water.
2. Na in presence of air burns with golden flame. It forms Sodium peroxide.
3. The formula of sodium peroxide is Na₂O₂

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Similar questions

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 ?

N a

is heated in presence of air, it forms

Q. (a) What is the nature of the oxide SO₂? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
(b) What is the nature of the oxide Na₂O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.

Q. Assertion :Heat of solution is positive when

{N a}_{2} {S O}_{4} \cdot 10 H_{2} O

is dissolved in water but it is negative when anhydrous

C u {S O}_{4}

is dissolved in water. Reason: Molar masses of

{N a}_{2} {S O}_{4} \cdot 10 H_{2} O

C u {S O}_{4}

Q. What happens when a piece of

N a

is added to cold water? Give suitable equation.

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