Which of the following stability order of anions is/are correct

Write the type of the reaction in each of the following cases.

(I) ${\mathrm{CH}}_2={\mathrm{CH}}_2\stackrel{{\mathrm{H}}_3{\mathrm{O}}^{+}}{\to }{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$

(II) ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{Br}\stackrel{\mathrm{NaOH}}{\to }{\mathrm{CH}}_3-{\mathrm{CH}}_2\mathrm{OH}$

(III)

(IV) 

(V)

(VI)

(VII)

(VIII) 

Among the following, $\mathrm{X}$ is the number of electrophiles and $\mathrm{Y}$ is the number of nucleophiles. Report your answer as $\mathrm{X} \mathrm{Y}$.

(i) ${\mathrm{CH}}_3^{\oplus }$

(ii) ${\mathrm{I}}^{\mathrm{\Theta }}$

(iii) ${\mathrm{NO}}_2^{\oplus }$

(iv) ${\stackrel{\overline{)-}}{\mathrm{CH}}}_3$

(v) $\ddot{\mathrm{N}}{\mathrm{H}}_3$

(vi) ${\mathrm{Br}}^{\oplus }$

(vii) $\stackrel{⊝}{\mathrm{C}}\mathrm{l}$

(viii) ${\mathrm{H}}^{+}$

(ix) ${\mathrm{AlCl}}_3$

(x) ${\mathrm{CH}}_3\mathrm{OH}$

(xi) ${\mathrm{CH}}_3-\stackrel{\oplus }{\mathrm{C}}=\mathrm{O}$

(xii) ${\mathrm{BH}}_3$

Which statement is correct about photochemical bromination of butane?

${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3\stackrel{{\mathrm{Br}}_2,h\nu }{⟶}$