What is the product obtained from the hydrolysis of $(Me)_2SiCl_2$?

The correct order of acidic character of the following is:

Which of the following allotropes of carbon is isomorphous with crystalline silicon?

For correct statement use $T$ and for incorrect use $F$:
$(A)$ Hydrolysis of Marshall's acid gives $H_2SO_4$ and $H_2O_2$ as final products.
$(B)$ In $SCNSiH_3$ structure,the geometry around $N$ is bent.
$(C)$ The basic unit for silicates is $SiO_4^{4-}$.
$(D)$ $NH_4Cl + NaOH \to NH_3 \uparrow$.

The gas that cannot be collected over water is:

Silica is soluble in which of the following?