Al2O3.2SiO2.2H2O is the chemical formula for
- AMonazite
- BChina clay
- CSand
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (b) China clay
Explanation
Al₂O₃·2SiO₂·2H₂O is kaolinite, the main mineral of china clay (kaolin), a hydrated aluminium silicate. It is named after Kaoling in China.
It is used to make porcelain and ceramics, paper and paints. Monazite is a phosphate of thorium and rare-earth metals, and sand is mostly silica (SiO₂).