Tardigrade
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Tardigrade
Question
Chemistry
The gas evolved on heating CaF2 and SiO2 with concentrated H2SO4, on hydrolysis gives a white gelatinous precipitate. The precipitate is:
Q. The gas evolved on heating
C
a
F
2
and
S
i
O
2
with concentrated
H
2
S
O
4
, on hydrolysis gives a white gelatinous precipitate. The precipitate is:
1889
228
The p-Block Elements
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A
hydrofluosilicic acid
28%
B
silica gel
29%
C
silicic acid
20%
D
calciumfluorosilicate
23%
Solution:
2
C
a
F
2
+
S
i
O
2
+
H
2
S
O
4
→
S
i
F
4
+
H
2
O
+
C
a
S
O
4
hydrolysis
C
a
S
i
F
6