Silicates

Q. How many oxygen atoms are shared among the tetrahedron of a silicate anion in the mineral beryl?

Q.

The structural unit pesent in pyro sillicates is

1. 

2. 

3. 

4. 

Q.

An inorganic compound (A) is made of two most occuring elements in the Earth's crust and has a polymeric tetrahedral network structure. With carbon, compound (A) produces a poisonous gas (B) which is the most stable diatomic molecule. Compounds (A) and (B) will be

1. $Si{O}_2,C{O}_2$

2. $Si{O}_2,CO$

3. $SiC,CO$

4. $Si{O}_2,N_2$

Q.

Name of the structure of silicates in which three oxygen atoms of $[Si{O}_4{]}^{4-}$ are shared -

1. Pyrosilicate

2. Linear chain silicate

3. Sheet silicate

4. Three dimensional silcate

Q. Name the structure of silicates in which only one oxygen atom of $[Si{O}_4{]}^{-}$ are shared:

1. Three dimensional silicate
2. Sheet silicate
3. Linear chain silicate
4. Pyrosilicate

Q.

Name the structure of silicates in which three oxygen atoms of $[Si{O}_4{]}^{-}$ are shared:

1. Three dimensional silicate

2. Linear chain silicate

3. Pyrosilicate

4. Sheet silicate

Q.

Fedlspars and zeolites are examples of:

1. Sheet silicates

2. 3-dimensional silicates

3. Pyrosilicates

4. Cyclic silicates

Q.
The silicate anion given above in a mineral has $K^{+},C{a}^{2+}$ and $A{l}^{3+}$ cations in 2:1:2. Number of moles of $A{l}^{3+}$ ions per 4 moles of mineral is

Q. Aluminosilicates have positive charge.

1. True
2. False

Q. Formulae of various silicates are given in left column. Match them with their type.

1. Ortho silicates
2. Pyro silicates
3. Cyclic silicates
4. 2D-sheet silicates