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Gases in Liquids

Which of the ...

Question

Which of the following solutions gives precipitate with $P b {(N O_{3})}_{2}$ but not with $B a {(N O_{3})}_{2}$ ?

A

Sodium chloride

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B

Sodium sulphate

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C

Sodium nitrate

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D

Sodium hydrogen phosphate

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Solution

The correct option is A Sodium chloride
Option (A) is correct.
Sodium chloride solutions gives precipitate with $P b {(N O_{3})}_{2}$ but not with $B a {(N O_{3})}_{2}$ .
$P b C l_{2}$ is insoluble in cold water but soluble in hot water and on cooling white crystals are again formed.
$N a C l + P b {(N O_{3})}_{2} ⟶ P b C l_{2} + N a N O_{3}$

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