From the stability constant (hypothetical values), given below, p… - Vidyadip

MCQ

From the stability constant (hypothetical values), given below, predict which is the strongest ligand :

A
$Cu^{2+} + 4NH_3 \rightleftharpoons [Cu(NH_3)_4]^{2+} \,\,\,,$ $K = 4.5 \times 10^{11}$
✓
$Cu^{2+} +4CN^- \rightleftharpoons [Cu(CN)_4]^{2-} \,\,\,,$ $K = 2.0 \times 10^{27}$
C
$Cu^{2+} + 2en \rightleftharpoons [Cu(en)_2]^{2+} \,\,\,,$ $K = 3.0 \times 10^{15}$
D
$Cu^{2+} + 4H_2O \rightleftharpoons [Cu(H_2O)_4]^{2+} \,\,\,,$ $K = 9.5 \times 10^8$

✓

Answer

Correct option: B.

$Cu^{2+} +4CN^- \rightleftharpoons [Cu(CN)_4]^{2-} \,\,\,,$ $K = 2.0 \times 10^{27}$

b
A stability constant is an equilibrium constant for the formation of
a complex in solution. It is a measure of the strength of the interaction
between the reagents that come together to form the complex.
As $C u^{2+}+4 C N^{-} \rightleftharpoons\left[C u(C N)_{4}\right]^{2-}, K=2.0 \times 10^{27}$ has maximum value of
stability constant so $C N^{-}$ is strongest ligand.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The de Broglie wavelength of a car of mass $1000\, kg$ and velocity $36\, km/hr$ is

The $UPAC$ name of the compound $C{H_2} = CH - C{H_2} - C{H_2} - C \equiv CH$ is

Which of the following attraction is strongest ?

Consider the following compounds :

Hyperconjugation occurs in

In the following sets of reactants which two sets best exhibit the amphoteric characters of $Al_2O_3. xH_2O$ ?

Set $1$: $Al_2O_3 .xH_2O\, (s)$ and $OH^-(aq)$

Set $2$: $Al_2O_3 .xH_2O\, (s)$ and $H_2O\,(l)$

Set $3$: $Al_2O_3 .xH_2O\, (s)$ and $H^+(aq)$

Set $4$: $Al_2O_3 .xH_2O\, (s)$ and $NH_3(aq)$

The cell constant of a given cell is $0.47\,cm^{-1}$. The resistance of a solution placed in this cell is measured to be $31.6\,ohm$. The conductivity of the solution (in $S\,cm^{-1}$ where $S$ has usual meaning) is

In benzene, all the six $C-C$ bonds have the same length because of

What will be the electrode potential of $Cu$ electrode dipped in $0.025\,M\, CuSO_4$ solution if at $298\, K\, Cu$ has the standard reduction potential $0.34\, V$ ............ $\mathrm{V}$

$IUPAC$ name of the below is :

$1 \times 10^{-5}\,M \textrm {AgNO } _ { 3 }$ is added to $1\,L$ of saturated solution of $AgBr$. The conductivity of this solution at $298\,K$ is $.........\times 10^{-8}\,S\,m ^{-1}$

$\left[\right.$ Given : $K _{ sp }( AgBr )=4.9 \times 10^{-13}$ at $298 K$

$\lambda_{ Ag ^{+}}^0=6 \times 10^{-3} Sm ^2\,mol ^{-1}$

$\lambda_{ Br ^{-}}^0=8 \times 10^{-3} Sm ^2\,mol ^{-1}$

$\left.\lambda_{ NO _3^{-}}^0=7 \times 10^{-3} Sm ^2\,mol ^{-1}\right]$