TS EAMCET 2018 (04-May Shift-1)

Which of the following complex ions does not exist?

Which of the following statements are correct?
a) The isotope of carbon containing $7$ neutrons has natural abundance of $1.1\%$
b) Among the IV A group elements, Sn has the lowest melting point
c) Silicon is the $2^{\mathrm{nd}}$ (by mass) most abundant element in the earth's crust
d) Elemental carbon shows the highest electrical resistivity among the $14$ group elements

The first ionisation energies (in ${\mathrm{kJmol}}^{-1}$) of four consecutive elements of the second period are given in the options. The first ionisation energy of nitrogen is

The set of amphoteric oxides among the given oxides are
${\mathrm{Ga}}_2{\mathrm{O}}_3, {\mathrm{As}}_4{\mathrm{O}}_{10}, {\mathrm{Sb}}_4{\mathrm{O}}_{10},{ \mathrm{B}}_2{\mathrm{O}}_3, {\mathrm{Tl}}_2\mathrm{O}$

The products $\mathrm{P}$ and $\mathrm{Q}$ of the following reaction, respectively, are $\mathrm{a} {\mathrm{S}}_8( \mathrm{s})+\mathrm{bNaOH}\left(\mathrm{aq}\right)⟶\mathrm{P}\left(\mathrm{aq}\right)+\mathrm{qQ}\left(\mathrm{aq}\right)+{\mathrm{rH}}_2\mathrm{O}$

Assertion A : ${\mathrm{SF}}_6$ is highly stable
Reason (R) : ${\mathrm{SF}}_6$ is a gas
The correct option among the following is

In the following reaction sequence, the compound $\mathrm{C}$ is
$\mathrm{Al}+{\mathrm{N}}_2\stackrel{\Delta }{⟶}\left(\mathrm{A}\right)\stackrel{{\mathrm{H}}_2\mathrm{O}}{⟶}\mathrm{B}\left(\mathrm{ppt}\right)+\mathrm{C}\left(\mathrm{g}\right)$

Complete hydrolysis of ${\mathrm{XeF}}_4$ and ${\mathrm{XeF}}_6$ gives its oxides $\mathrm{P}$ and $\mathrm{Q},$ respectively. Identify $\mathrm{P}$ and $\mathrm{Q}$