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[" The gas evolved on heating "CaF(2)" a...

[" The gas evolved on heating "CaF_(2)" and "SiO_(2)" with concentrated "H_(2)SO_(4)" ,on hydrolysis give "],[" gelatinous precipitate.The precipitate is: "]

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The gas evolved on heating CaF_(2) and SiO_(2) with concentrated H_(2)SO_(4) , on hydrolysis gives a white gelatinous precipitate. The precipitate is :

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