Silicates

Q. Pyrosilicate ion is:

1. $S{i}_2{O}_4^{4-}$
2. $S{i}_2{O}_7^{6-}$
3. $S{i}_2{O}_2^{6-}$
4. $S{i}_2{O}_2^{7-}$

Q. The general formula of silicate ion present cyclic silicates is:

1. $Si{O}_4^{4-}$
2. $S{i}_2{O}_5^{2-}$
3. $S{i}_2{O}_7^{6-}$
4. $(Si{O}_3{)}_n^{2n-}$

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. Which one is the incorrect statement regarding 3D sheet silicates ?

1. Negative charge on silicate is neutralised by positive charged metal ions.
2. Silicate units are links together to form 3D silicates
3. Quartz and Tridymite are 3D sheet silicates
4. 3 corners of the silicates were shared to form 3D network

Q. Zeolites can be used as/in:

1. petrochemical industries during cracking
2. ion-exchange beds in water purification
3. the hydrolysis of ester
4. the preparation of $H_{2}S{O}_4$

Q. The $Si-O-Si$ bond angle in pyrosilicates is always $180°$.

1. True
2. False

Q. Pyrosilicate ion is:

1. $S{i}_2{O}_4^{4-}$
2. $S{i}_2{O}_7^{6-}$
3. $S{i}_2{O}_2^{6-}$
4. $S{i}_2{O}_2^{7-}$

Q. Which of the followings are not a general formula of silicate ion present cyclic silicates ?

1. $Si{O}_4^{4-}$
2. $S{i}_2{O}_5^{2-}$
3. $S{i}_2{O}_7^{6-}$
4. $(Si{O}_3{)}_n^{2n-}$

Q. Bleaching powder is obtained by

1. $CaO+C{l}_2$
2. $CaC{O}_3+C{l}_2$
3. $Ca(OH{)}_2+C{l}_2$
4. $CaC{l}_2+C{l}_2$

Q. The basic structural unit of zeolite is:

1. $Si{O}_4^{4-}$
2. $Si{O}_2$
3. $(R_{2}SiO{)}_n$
4. $(Si{O}_3{)}_n^{2n-}$

Q.

Silicon reacts with hot solution of NaOH forming

1. $Si(OH{)}_4$

2. $Si(OH{)}_2$

3. $Si{O}_2$

4. $N{a}_{4}Si{O}_4$

Q. The value of $n$ in the molecular formula $B{e}_{n}A{l}_{2}S{i}_6{O}_{18}$ is:

Q. Which one of the following group represent 2-D silicate?

1. $Si{O}_4^{4-}$
2. $(S{i}_2{O}_5{)}_n^{2n-}$
3. $S{i}_2{O}_7^{6-}$
4. $(Si{O}_3{)}_n^{2n-}$

Q. Which of the following statement is/are correct for double chain silicates?

1. There are two types of tetrahedra: those sharing 2 vertices and those sharing only 1 vertices.
2. There are two types of tetrahedra: those sharing 3 vertices and those sharing only 2 vertices.
3. There are only one type of tetrahedra.
4. None of the above

Q. The general formula of silicate ion present in cyclic silicates is:

1. $Si{O}_4^{4-}$
2. $S{i}_2{O}_5^{2-}$
3. $S{i}_2{O}_7^{6-}$
4. $(Si{O}_3{)}_n^{2n-}$

Q.

The structural unit pesent in pyro sillicates is

1. $S{i}_3{O}_9^{6-}$

2. $Si{O}_4^{4-}$

3. $S{i}_2{O}_7^{6-}$

4. $(S{i}_2{O}_5^{2-}{)}_n$

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. The basic structural unit of ortho-silicates is :

1. $Si{O}_4^{4-}$
2. $Si{O}_3^{2-}$
3. $Si{O}_4^{2-}$
4. SiO

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. The $Si-O-Si$ bond angle in pyrosilicates is always $180°$.

1. True
2. False

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. Under hydrolytic conditions, the compounds used in the preparation of linear polymer and for chain termination respectively, are

1. $C{H}_{3}SiC{l}_{3}andSi(C{H}_3{)}_4$
2. $\left(C{H}_3{)}_{2}SiC{l}_{2}and\right(C{H}_3{)}_{3}SiCl$
3. $(C{H}_3{)}_{2}SiC{l}_{2}andC{H}_{3}SiC{l}_3$
   
4. $SiC{l}_{4}and(C{H}_3{)}_{3}SiCl$