Arrange the following in the increasing order of number of unpaired electrons present in the central metal ion:
I. \([MnCl_6]^{4-}\)
II. \([FeF_6]^{3-}\)
III. \([Mn(CN)_6]^{3-}\)
IV. \([Fe(CN)_6]^{3-}\)
Arrange the following in the increasing order of number of unpaired electrons present in the central metal ion:
I. \([MnCl_6]^{4-}\)
II. \([FeF_6]^{3-}\)
III. \([Mn(CN)_6]^{3-}\)
IV. \([Fe(CN)_6]^{3-}\)
Show Hint
- \( IV<I<III<II \)
- \( I<III<II<IV \)
- \( IV<III<I<II \)
- \( I<II<III<IV \)
The Correct Option is C
Solution and Explanation
Step 1: Determining the number of unpaired electrons
- The number of unpaired electrons in a complex depends on the oxidation state of the metal and the ligand strength.
- Cyanide (\( CN^- \)) is a strong field ligand, leading to low spin configurations.
- Fluoride (\( F^- \)) and chloride (\( Cl^- \)) are weak field ligands, leading to high spin configurations.
Step 2: Electron Configurations
- \([MnCl_6]^{4-}\) → High spin (\( Mn^{2+} \), \( d^5 \)) → 5 unpaired electrons
- \([FeF_6]^{3-}\) → High spin (\( Fe^{3+} \), \( d^5 \)) → 5 unpaired electrons
- \([Mn(CN)_6]^{3-}\) → Low spin (\( Mn^{4+} \), \( d^3 \)) → 3 unpaired electrons
- \([Fe(CN)_6]^{3-}\) → Low spin (\( Fe^{3+} \), \( d^5 \)) → 1 unpaired electron
Step 3: Arranging in Increasing Order - \( IV (1)<III (3)<I (5)<II (5) \) Thus, the correct order is: \[ IV<III<I<II \]
Top AP EAMCET Chemistry Questions
- If the $pK_a$ of acetic acid and $pK_b$ of dimethylamine are $4.76$ and $3.26$ respectively, the pH of dimethyl ammonium acetate solution is
- In the first order thermal decomposition of $C _{2} H _{5} I (g) \longrightarrow C _{2} H _{4}(g)+ HI (g)$, the reactant in the beginning exerts a pressure of $2$ bar in a closed vessel at $600 \,K$. If the partial pressure of the reactant is $0.1$ bar after $1000$ minutes at the same temperature the rate constant in $\min ^{-1}$ is $(\log 2=0.3010)$
- Isopropyl benzene on aerial oxidation followed by acid hydrolysis of the resulting compound yields
- Sodium nitrite is reacted with $H_2SO_4$ to form $NaHSO_4, HNO_3$, water and $X$. Gold is dissolved in aqua-regia to form water, $AuCl^{-}_4$ and $Y. X$ and $Y$ are respectively
- The average translational kinetic energy of a molecule in a gas becomes equal to $0.69\, eV$ at a temperature about [Boltzmann constant = $1.38 \times 10^{-23} \; J \; K^{-1}$]
Top AP EAMCET properties of d block elements Questions
- Identify the set of acidic oxides.
If uncertainty in position and momentum of an electron are equal, then uncertainty in its velocity is:
The graph shown below represents the variation of probability density, \( \Psi(r) \), with distance \( r \) of the electron from the nucleus. This represents:
Match the following elements with their correct classifications:
- What is the ratio of kinetic energies of \(3 \, {g}\) of hydrogen and \(4 \, {g}\) of oxygen at a certain temperature?
Top AP EAMCET Questions
- If $\int \cos x . \cos 2x . \cos 5x dx = A \; \sin 2x + B \sin 4x + C \sin 6x + D \sin 8x + k $ (where $k$ is the arbitrary constant of integration), then $\frac{1}{B} + \frac{1}{C} = $
- If $k$ is one of the roots of the equation $x^2 - 25x + 24 = 0 $ such that $A = \begin{bmatrix}1&2&1\\ 3&2&3\\ 1&1&k\end{bmatrix} $ is a non-singular matrix, then $A^{-1}$ =
- If only $\frac{1}{51}^{th}$ ot the main current is to be passed through a galvanometer then the shunt required is $R_1$ and if only $\frac{1}{11}^{th}$ of the main voltage is to be developed across the galvanometer, then the resistance required is $R_2$. Then $\frac{R_2}{R_1} =$
- If $p$ and $q$ are respectively the global maximum and global minimum of the function $f(x) = x^2 e^{2x}$ on the interval $[-2, 2]$ , then $pe^{-4} + qe^4 = $
- If $\displaystyle\sum^n_{k - 1} \tan^{-1} \left( \frac{1}{k^2 + k + 1} \right) = \tan^{-1} (\theta) $ , then $\theta$ =