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Standard XII

Chemistry

Introduction to d and f Block Elements

Urea reacts w...

Question

Urea reacts with water to form $A$ , which will decompose to form $B$ . When $B$ is passed into a white precipitate of $C$ which is formed when $A g^{+} (a q)$ and $C l^{-} (a q)$ are mixed then a colourless solution of $D$ is formed. What is the formula of $D$ ?

A g N O_{3}

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[A g (N H_{3})_{2}]^{+}

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[A g (N H_{3})_{2}]^{2 +}

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A g C l

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Solution

The correct option is B $[A g (N H_{3})_{2}]^{+}$
$N H_{2} C O N H_{2} + 2 H_{2} O \to (N H_{4})_{2} C O_{3} A (N H_{4})_{2} C O_{3} A ⇌ 2 N H_{3} B + H_{2} O + C O_{2}$
$A g^{+} + C l^{-} ⇌ A g C l (s) C$
$A g C l (s) C + 2 N H_{3} B \to [A g (N H_{3})_{2}] C l D$

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Urea reacts with water to form A, which will decompose to form B. When B is passed into a white precipitate of C which is formed when Ag+(aq) and Cl−(aq) are mixed then a colourless solution of D is formed. What is the formula of D?

The correct option is B [Ag(NH3)2]+NH2CONH2+2H2O→(NH4)2CO3A(NH4)2CO3A⇌2NH3B+H2O+CO2 Ag++Cl−⇌AgCl(s)C AgCl(s)C+2NH3B→[Ag(NH3)2]ClD

Urea reacts with water to form $A$ , which will decompose to form $B$ . When $B$ is passed into a white precipitate of $C$ which is formed when $A g^{+} (a q)$ and $C l^{-} (a q)$ are mixed then a colourless solution of $D$ is formed. What is the formula of $D$ ?

The correct option is B $[A g (N H_{3})_{2}]^{+}$
$N H_{2} C O N H_{2} + 2 H_{2} O \to (N H_{4})_{2} C O_{3} A (N H_{4})_{2} C O_{3} A ⇌ 2 N H_{3} B + H_{2} O + C O_{2}$
$A g^{+} + C l^{-} ⇌ A g C l (s) C$
$A g C l (s) C + 2 N H_{3} B \to [A g (N H_{3})_{2}] C l D$