Elements of group $14$:

For the $14^{th}$ group (carbon family),which of the following statements is correct regarding the properties as the atomic number increases?

Which of the following is an amphoteric oxide?

What do you understand by $(a)$ inert pair effect,$(b)$ allotropy,and $(c)$ catenation?

Helium mixed with oxygen is used in the treatment of

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