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Binary Compounds - Hydrides

A binary salt...

Question

A binary salt $(A)$ on reaction with $H_{2} O$ gives $B (a q)$ and $C (g)$ . $(C)$ gas on passing into ammonia-cal $A g N O_{3}$ gives white ppt $D (a q)$ . $C O_{2}$ gas turns $B (a q)$ milky. Identify $(A), (B), (C)$ and $(D)$ .

Then the compound B is_________.

C_{2} A g_{2}

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C a (O H)_{2}

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C a C_{2} (C a^{2 +}, C_{2}^{2 -} b i n a r y)

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C_{2} H_{2}

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Solution

The correct option is B $C a (O H)_{2}$
Option (B) is correct.
$C a C_{2} [A] + H_{2} O ⟶ C a (O H)_{2} [B] + C O_{2} [C]$
$A g N O_{3} + C O_{2} ⟶ A g_{2} C O_{3} [D] + N O_{3}$
$C a (O H)_{2} [B] + C O_{2} ⟶ C a C O_{3} + H_{2} O$

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