Consider the following statements:
(P) $[Mn {(H_{2} O)}_{4}] {SO}_{4}$ is paramagnetic.
(Q) Crystal field splitting energy (i.e. $Δ_{0}$ ), in ${[Cr {(H_{2} O)}_{6}]}^{3 +}$ is higher than in ${[Cr {(H_{2} O)}_{6}]}^{2 +}$ .
(R) Wilkinson catalyst $[RhCl {({Ph}_{3} P)}_{3}]$ , a red-violet complex is diamagnetic and square planar.
(S) $Hg {[Co (SCN)_{4}]}_{3}$ , a deep blue complex is paramagnetic and tetrahedral.
and of these select the correct set from the given options.

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P, R and S only

P, Q, R and S

P and S only

Q, R and S only

answer is D.

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Detailed Solution

The correct statements are,
P) $[Mn (H_{2} O)_{4}] {SO}_{4}$ is paramagnetic.
Q) Crystal field splitting energy (i,e. $Δ_{0}$ ), in ${[Cr {(H_{2} O)}_{6}]}^{3 +}$ is higher than in ${[Cr {(H_{2} O)}_{6}]}^{2 +}$ .
R) Wilkinson catalyst $[RhCl {({Ph}_{3} P)}_{3}]$ , a red-violet complex is diamagnetic and square planar.
S) $Hg [Co ({SCN}_{4}]$ , a deep blue complex is paramagnetic and tetrahedral.