Name a chloride salt used for identification of water vapour

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Solution

Concept used: identification of gases
For the detection of water vapours, Anhydrous Cobalt chloride, $C O C l_{2}$ is used. When gas containing water vapours is passed over the blue coloured paper, it turns pink.
Final Answer: The salt used is anhydrous Cobalt chloride $C O C l_{2}$

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Name :

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