Which of the following is not a monomer for a high molecular mass silicone polymer?

The stability of dihalides of $Si, Ge, Sn$ and $Pb$ follows the sequence.

Give uses of $CO_{2}$.

The element whose hydride contains the maximum number of hydrogen atoms per atom of the element is

Explain the physical properties of group $14$ elements.

Gas $A$ is bubbled through slaked lime when a white precipitate is formed. On prolonged bubbling,the precipitate is dissolved. On heating the resultant solution,the white precipitate reappears with the evolution of gas $B$. The gases $A$ and $B$ respectively are