1. Tardigrade
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  3. Chemistry
  4. The gas evolved on heating CaF2 and SiO2 with concentrated H2SO4, on hydrolysis gives a white gelatinous precipitate. The precipitate is:

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Q. The gas evolved on heating $CaF_2$ and $SiO_2$ with concentrated $H_2SO_4$, on hydrolysis gives a white gelatinous precipitate. The precipitate is:

The p-Block Elements

Solution:

$2CaF_2 + SiO_2 + H_2SO_4 \rightarrow SiF_4 + H_2O + CaSO_4 \xrightarrow{\text{hydrolysis}} CaSiF_6$