Exams › JEE Advanced › Chemistry

In the mineral beryl, Be3Al2Si6O18, how many oxygen atoms are shared by each SiO4 tetrahedral unit?

1. 1
2. 2
3. 3
4. 4

Correct answer: 2

Solution

Beryl belongs to the cyclosilicate class with Si6O18¹²- ring anion. In this six-membered ring structure, each SiO4 tetrahedron shares two of its four oxygen atoms with neighboring tetrahedra (the two bridging oxygens), while two oxygens remain unshared (terminal). Hence, each SiO4 unit shares 2 oxygen atoms.

Related JEE Advanced Chemistry questions

• What is formed when an excess amount of sodium hydroxide is added to a solution of stannous chloride?
• Which of the following substituted silanes can form a cross-linked silicone polymer upon undergoing hydrolysis?
• Which pairs of reactants most effectively demonstrate the dual acidic and basic behavior of Al2O3.xH2O?
• Among the following oxides, which one acts as the most potent oxidizing agent?
• Among the following compounds, which one acts as the most powerful reducing agent?
• Which xenon-oxygen compound cannot be produced through the hydrolysis of xenon fluorides?

⚔️ Practice JEE Advanced Chemistry free + battle 1v1 →