The p-Block Ele...

Borax is actually made of two tetrahedral and two triangular units joined together and should be written as: $$\displaystyle  Na_{2}[B_{4}O_{5}(OH)_{4}]\cdot 8H_{2}$$O 
Consider the following statements about borax. Which of the following is the correct statement?

If we start with $$MeSiCl_{3}$$ as the starting material, silicones formed is :

$$RCl \displaystyle \xrightarrow[Si]{cu-powder} R_{2}SiCl_{2} \xrightarrow{H_{2}O} R_{2}Si\left ( OH \right )_{2} \xrightarrow{condensation} A$$
Compound ( A ) is :

An inorganic compound (A) made of two most occurring elements into the earth crust, having 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 :

Select correct statement:

Stability of hydrides of carbon family is in order :

Silica will react in a similar way with metal sulphates (and Phosphates) as it does with carbonates, giving a solid residue and a gas. $$1$$ mole of silica reacts with $$1$$ mole of sodium sulphate, $$Na_2SO_4$$. Write the equation:

Water glass is :

Silicon is an important constituent of:

Elements of group $$14$$ used in semiconductors are :