The $C-C$ bond length is maximum in?

Which one of the following elements will remain as liquid inside pure boiling water?

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:

If the starting material for the manufacture of silicones is $RSiCl_3$,write the structure of the product formed.

What would be the major product of the following reaction: $SiCl_4 \xrightarrow{\text{Excess of } H_2O}$?