CFSE Comparison

Q. Among the species given below, the total number of diamagnetic species is

$H$ atom, $N{O}_2$ monomer, $O_2^{-}$ superoxide, dimeric sulphur in vapour phase, $M{n}_3{O}_4,\left(N{H}_4{)}_2\right[FeC{l}_4],(N{H}_4{)}_2\left[NiC{l}_4\right],K_{2}Mn{O}_4,K_{2}Cr{O}_4$

Q. Predict the order of ${\Delta }_o$ for the following compounds:-
(i) $\left[Cr\right(H_{2}O{)}_6{]}^{3+}$
(ii) $\left[Cr\right(CN{)}_2(H_{2}O{)}_4{]}^{-}$
(iii) $\left[Cr\right(CN{)}_4(H_{2}O{)}_2{]}^{-}$
(iv) $\left[Cr\right(CN{)}_6{]}^{3-}$

1. ${\Delta }_o\left(i\right)<{\Delta }_o\left(ii\right)<{\Delta }_o\left(iii\right)<{\Delta }_o\left(iv\right)$
2. ${\Delta }_o\left(i\right)>{\Delta }_o\left(ii\right)>{\Delta }_o\left(iii\right)>{\Delta }_o\left(iv\right)$
3. ${\Delta }_o\left(ii\right)={\Delta }_o\left(iii\right)<{\Delta }_o\left(i\right)<{\Delta }_o\left(iv\right)$
4. ${\Delta }_o\left(ii\right)<{\Delta }_o\left(iii\right)<{\Delta }_o\left(iv\right)<{\Delta }_o\left(i\right)$

Q. Crystal field stabilization energy for $\left[Co\right(N{H}_3{)}_6{]}^{3+}$ octahedral complex excluding pairing energy is $x{\Delta }_o$. Then $\mid x\mid$ is:

Q. Predict the order of ${\Delta }_o$ for the following compounds:-
(i) $\left[Cr\right(H_{2}O{)}_6{]}^{3+}$
(ii) $\left[Cr\right(CN{)}_2(H_{2}O{)}_4{]}^{-}$
(iii) $\left[Cr\right(CN{)}_4(H_{2}O{)}_2{]}^{-}$
(iv) $\left[Cr\right(CN{)}_6{]}^{3-}$

1. ${\Delta }_o\left(i\right)<{\Delta }_o\left(ii\right)<{\Delta }_o\left(iii\right)<{\Delta }_o\left(iv\right)$
2. ${\Delta }_o\left(i\right)>{\Delta }_o\left(ii\right)>{\Delta }_o\left(iii\right)>{\Delta }_o\left(iv\right)$
3. ${\Delta }_o\left(ii\right)={\Delta }_o\left(iii\right)<{\Delta }_o\left(i\right)<{\Delta }_o\left(iv\right)$
4. ${\Delta }_o\left(ii\right)<{\Delta }_o\left(iii\right)<{\Delta }_o\left(iv\right)<{\Delta }_o\left(i\right)$

Q. The increasing order of acidities of the shown hydrogen atoms among the following is:

1. $III<II<I$
2. $II<I<III$
3. $I<II<III$
4. $II<III<I$