STD 12 - 5. Co-ordination chemistry — NEET STD 11 Science — Question

$A$. All the transition metals except scandium form $MO$ oxides which are ionic.

$B$. The highest oxidation number corresponding to the group number in transition metal oxides is attained in $Sc _2 O _3$ to $Mn _2 O _7$.

$C$. Basic character increases from $V _2 O _3$ to $V _2 O _4$ to $V _2 O _5$.

$D$. $V _2 O _4$ dissolves in acids to give $VO _4^{3-}$ salts.

$E$. $CrO$ is basic but $Cr _2 O _3$ is amphoteric.

Choose the correct answer from the options given below:

$(I)$ $I.P.$ 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)}^ + $