Given below are two statements, one is labelled as Assertion $A$ and the other is labelled as Reason $R$.

Assertion $A:$ The spin only magnetic moment value for $\left[ Fe ( CN )_6\right]^{3-}$ is $1.74 BM$, whereas for $\left[ Fe \left( H _2 O \right)_6\right]^{3+}$ is $5.92\,BM$.

Reason $R :$ In both complexes, $Fe$ is present in +3 oxidation state.

In the light of the above statements, choose the correct answer from the options given below:

  • [JEE MAIN 2023]
  • A

    Both $A$ and $R$ are true but $R$ is NOT the correct explanation of $A$

  • B

    $A$ is false but $R$ is true

  • C

    $A$ is true but $R$ is false

  • D

    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$

Similar Questions

Which of the comparison regarding $Zn,\,Cd,\,Hg$ is/are incorrect ?

$(I)$ $ZnCl_2$ is ionic whereas $CdCl_2$ and $HgCl_2$ are covalent

$(II)$ $Zn$ and $Cd$ dissolves in dilute acid $(HCl)$ liberating $H_2$ but $Hg$ can not

$(III)$ $Zn$ and $Cd$ forming with ppt. of $Zn(OH)_2$ and $Cd(OH)_2$ but $Hg$ forms coloured ppt. of

$(IV)$ all from $A_2^{2+}$ type ion

While filling up of electrons in the atomic orbitals, the $4 s$ orbital is filled before the $3 d$ orbital but reverse happens during the ionisation of the atom. Explain why?

A metal, $M$ forms chlorides in its $+2$ and $+4$ oxidation states. Which of the following statements about these chlorides is correct ?

  • [AIEEE 2006]

In a titration experiment, $10 \,mL$ of an $FeCl _{2}$ solution consumed $25\, mL$ of a standard $K _{2} Cr _{2} O _{7}$ solution to reach the equivalent point. The standard $K _{2} Cr _{2} O _{7}$ solution is prepared by dissolving $1.225\, g$ of $K _{2} Cr _{2} O _{7}$ in $250 \,mL$ water. The concentration of the $FeCl _{2}$ solution is closest to $.....\, N$
[Given : molecular weight of $K _{2} Cr _{2} O _{7}=294 \,g\, mol ^{-1}$ ]

  • [KVPY 2019]

Which of the following will give green hydrated ion