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Action of Water on Calcium Carbide

How many mole...

Question

How many moles of water vapour is evolved when 1 more of hydrated aluminium chloride dimer $(A l_{2} C l_{6} 12 H_{2} O)$ is strongly heated?

A

6

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B

5

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C

12

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D

9

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Solution

The correct option is D 9
$A l_{2} C l_{6} .12 H_{2} O \to A l_{2} O_{4} + 6 H C l ↑ 9 H_{2} O ↑$
$A l C l_{3}$ reacts with its own water of crystallisation
Hence option $D$ is correct.

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