STD 12 - 4. d and f- block elements — NEET STD 11 Science — Question

$(I)$ $I.P.$ of $O(g)$ is less than $I.P.$ of  $O_{\left( g \right)}^ - $

$(II)$ $I.P.$ of $Ne(g)$ is greater than $I.P$. of $Ne_{\left( g \right)}^ + $

$(III)$ $E.A.$ of $O_{\left( g \right)}^ + $ is greater than $E.A.$ of $O(g)$

$(IV)$ $I.P.$ of $N(g)$ is greater than $I.P.$ of $N_{\left( g \right)}^ + $

What is structure of $(A)$ ?

The original compound showed these properties also :

$\mathop {{C_9}{H_{12}}{O_2}}\limits_{(A)} \,\xrightarrow{{Na}}\,{H_2}$  liberated

$\mathop {{C_9}{H_{12}}{O_2}}\limits_{(A)} \,\xrightarrow{{Br}}$  no rapid reaction

$\mathop {{C_9}{H_{12}}{O_2}}\limits_{(A)} \,\xrightarrow[{cool}]{{Cr{O_3}\,/\,{H^ + }}}{C_9}{H_8}{O_3}$