When a colored gas is passed through bromine water,the color is discharged. Which gas is it?

Carbon can form $p\pi-p\pi$ bond with which kind of elements?

Which allotrope of carbon is isomorphous with crystalline silicon?

Ions consisting of two or more atoms which have properties similar to halide ions and contain at least one nitrogen atom are called ........

Assertion $(A)$: Silicones are used for water proofing of fabrics.
Reason $(R)$: The repeating unit in silicones is $R_2SiO$.

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T$:
$H_6\underline{Si}_2O_7 + H_2O \longrightarrow H_4SiO_4$