Which is formed when $SiC{l}_4$ vapours are passed over hot Mg?

(1) $SiC{l}_2+MgC{l}_2$

(2) $Si+MgC{l}_2$

(3) $M{g}_{2}Si+C{l}_2$

(4) $MgSiC{l}_6$

Asbestors is chemically:

1. silicate of calcium and magnesium

2. calcium alumino silicate

3. magnesium alumino silicates

4. calcium silicate + calcium aluminates

Aqueous solution of sodium silicate is:

(1) acidic

(2) alkaline

(3) neutral

(4) insoluble

Quartz is made of silicon and oxygen joined in a network arrangement that is similar to:

1. Diamond

2. Graphite

3. $O_2$

4. None of the above

The product obtained when silica reacts with hydrogen fluoride is:

1. SiF₄

2. H₂SiF₆

3. H₂SiF₄

4. H₂SiF₃

Silica reacts with Mg to form a magnesium compound (A). (A) react with dil. HCl and forms (B). (B) is:

(1) MgSiO

(2) MgO

(3) $MgC{l}_2$

(4) $SiC{l}_4$

Silica is reacted with sodium carbonate. Which is the gas liberated?

(1) CO

(2) $O_2$

(3) $O_3$

(4) $C{O}_2$

Quartz is an example of:

(1) chain silicate

(2) sheet silicate

(3) cyclic silicate

(4) three dimensional network silicate

The products of the following reaction are;

$Si{O}_2+C\stackrel{∆}{\to }$

1. SiC and $C{O}_2$

2. $SiO<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>CO$

3. SiC and CO

4. Si and $C{O}_2$

Which of the following shows bonding in silicone?

1. $Si-C-Si-O-Si$

2. $Si-C-Si-C-Si$

3. $<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>l<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>l<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>l$
$-Si-O-Si-O-Si-$

4. $Si-Si-Si-Si$