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Vant Hoff's Equation and Effect of Temperature on Equilibrium Constant

An unknown in...

Question

An unknown inorganic compound $(X)$ gave the following reaction:
(i) on heating $^{'} X^{'}$ gave a residue, oxygen and oxide of nitrogen.
(ii) addition of acetic acid and $K_{2} C r_{2} O_{7}$ to its aqueous solution give a yellow precipitate.
(iii) addition of $N a O H$ to its aqueous solution first forms a white precipitate, Dissolve in the excess of the reagent.
Identify the compound $(X)$ :

X = P b (N O_{3})_{2}

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X = P b (N O_{3})

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X = P b (N O_{2})_{2}

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None of these

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Solution

The correct option is A $X = P b (N O_{3})_{2}$
Option (A) is correct.
(i) On heating $P b (N O_{3})_{2}$ gave a residue, oxygen and oxide of nitrogen.
$P b (N O_{3})_{2} ⟶ P b O + O_{2} + N O_{2}$
(ii) Addition of acetic acid and $K_{2} C r_{2} O_{7}$ to its aqueous solution give a yellow precipitate. $P b (N O_{3})_{2} + K 2 C r O 4 ⟶ P b C r O_{4} (y e l l o w p p t) + K N O_{3}$
(iii) Addition of $N a O H$ to its aqueous solution first forms a white precipitate,which dissolves in the excess of the reagent.
$P b (N O_{3})_{2} + N a O H ⟶ P b (O H)_{2} (w h i t e p p t) + N a N O_{3}$
$P b (O H)_{2} + N a O H ⟶ N a_{2} P b O_{4} (s o l u b l e c o m p l e x) + H_{2} O$

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Similar questions

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(X)

gave the following reactions.
(i) the compound

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B a C l_{2}

, a precipitate insoluble in dilute

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N a O H

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N a O H

yielding a colorless solution. When

H_{2} S

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If the given statement is true enter 1, else enter 0.

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