The formula of $3$ membered discrete chain silicate is

Identify $B$ in the following reaction:
$H_4SiO_4$ $\xrightarrow[{-H_2O}]{1000^{\circ}C} A$ $\xrightarrow[\Delta]{Carbon} B + CO$

Which of the following halides is the most stable?

An inorganic compound $(A)$ made of the two most occurring elements in the earth's 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 $(B)$ are:

Which of the following organosilicon compounds on hydrolysis will give a three-dimensional silicone?

What is the increasing order of stability of the $+2$ oxidation state for the given group $14$ elements?