| The statements that are true of silicates among the following are |
| 1. Each silicon atom has four \[Si-O\]bonds arranged tetrahedral. |
| 2. Because of the availability of d-orbitals in |
| Si, water molecules can coordinate with |
| Si and bring about hydrolysis readily. |
| 3. \[Si-O\]bonds are strong; hence silica is inert having high melting point. |
| 4. Each oxygen atom in \[Si{{O}_{2}}\]is shared by 4 silicon atoms in the tetrahedra. |
A) 1, 2, 4
B) 1, 3, 4
C) 1, 3
D) 1, 2, 3, 4
Correct Answer: C
Solution :
[c]: Silicates are very inert and are not easily hydrolysed (statement 2 is wrong). Each oxygen atom in \[Si{{O}_{2}}\]is shared by 2 silicon atoms (not four). So statement 4 is wrong.
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