Q47.The gas evolved on heating CaF2 and SiO2 with concentrated H2 SO4 , on hydrolysis gives a white gelatinous precipitate. The precipitate is: (1) Silicic acid (2) Calcium fluorosilicate (3) Hydrofluorosilicic acid (4) Silica gel
What This Question Tests
This question requires knowledge of the reaction between CaF₂ and SiO₂ with H₂SO₄ to form SiF₄, and its subsequent hydrolysis to give silicic acid (H₂SiO₃), which appears as a white gelatinous precipitate.
Concepts Tested
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📋 Question Details
- Chapter
- p-block Elements
- Topic
- Chemistry of Silicon and Fluorine
- Year
- 2014
- Shift
- 09 Apr Online
- Q Number
- Q47
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 7: p-block Elements
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