MCQ
Which of the following has diamagnetic character
- A${[NiC{l_4}]^{2 - }}$
- B${[Co{F_6}]^{3 - }}$
- C${[Fe{({H_2}O)_6}]^{2 + }}$
- ✓${[Ni{(CN)_4}]^{2 - }}$
✓
Answer
Correct option: D.
${[Ni{(CN)_4}]^{2 - }}$
d
(d) $Ni$ in presence of $C{N^ - }$
(d) $Ni$ in presence of $C{N^ - }$
$Ni^{+2}$ in presence $C{N^ - } = [Ar]$
As ${[Ni{(CN)_4}]^{2 - }}$ has no unpaired electron. It is diamagnetic.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The following sets of quantum numbers represent four electrons in an atom
→$(i)$ $n\, = 4, l\, = 1$ $(ii)$ $n\, = 4, l\, = 0$
$(iii)$ $n\, = 3, l\, = 2$ $(iv)$ $n\, = 3, l\, = 1$
The sequence representing increasing order of energy, is
Dimerisation in carboxylic acid is due to
Consider the cell at $25^{\circ} \mathrm{C}$
→$\mathrm{Zn}\left|\mathrm{Zn}^{2+}(\mathrm{aq}),(1 \mathrm{M}) \| \mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq})\right| \mathrm{Pt}(\mathrm{s})$
The fraction of total iron present as $\mathrm{Fe}^{3+}$ ion at the cell potential of $1.500\, \mathrm{~V}$ is $\mathrm{X} \times 10^{-2}$. The value of $x$ is $.....$ (Nearest integer).
$\left(\right.$ Given $\left.E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{0}=0.77\, \mathrm{~V}, \mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{0}=-0.76 \,\mathrm{~V}\right)$
The $IUPAC$ name of $n-$butyl chloride is
→Which is the $IUPAC$ name of
→$\begin{array}{*{20}{c}}
{\,{C_2}{H_5}} \\
{|\,\,\,\,\,} \\
{C{H_3} - C - C{H_2}Cl} \\
{|\,\,\,\,\,} \\
{\,{C_2}{H_5}}
\end{array}$
Which one of the following statement for order of reaction is not correct
Assertion : Tropylium cation is aromatic in nature (figure)
Reason : The only property that determines its aromatic behaviour is its planar structure.
$\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
H-C-D\xrightarrow{{{H}^{18}}{{O}^{-}}} \\
\end{matrix}\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
D-C-{}^{18}{{O}^{-}}+C{{H}_{2}}D-OH \\
\end{matrix}$
→O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
H-C-D\xrightarrow{{{H}^{18}}{{O}^{-}}} \\
\end{matrix}\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
D-C-{}^{18}{{O}^{-}}+C{{H}_{2}}D-OH \\
\end{matrix}$
Above reaction is known as
The correct relationship between molality $(m)$ and molarity $(M)$ of a solution is ($d =$ density in $g/ml$ )
→What is the chief product obtained when $n-$ butane is treated with bromine in the presence of light at ${130\,^o}C$
→