At high temperature,nitrogen combines with calcium carbide $(CaC_2)$ to give:

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 $SiO_4^{4-}$.
$(D)$ $NH_4Cl + NaOH \to NH_3 \uparrow$.

In the laboratory,silicon can be prepared by the reaction:

Which of the following oxides reacts with both $HCl$ and $NaOH$?

Give uses of carbon dioxide.

Carborundum is obtained when silica is heated at high temperature with