When pyridine is added to an aqueous solution of nickel sulfate followed by the addition of an aqueous solution of sodium nitrite,deep blue crystals of .......... are obtained.
- A$[Ni(Py)_4]SO_4$
- B$[Ni(Py)_2(NO_2)_2]$
- C$[Ni(Py)_4](NO_2)_2$
- D$[Ni(Py)_3(NO_2)]_2SO_4$
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Which of the following ligands does not act as a $\pi$-acid ligand?
Assertion : $NF_3$ is a weaker ligand than $N(CH_3)_3$.
Reason : $NF_3$ ionizes to give $F^{-}$ ions in aqueous solution.
Reason : $NF_3$ ionizes to give $F^{-}$ ions in aqueous solution.
MediumAIIMS 2017
View SolutionWhat is meant by the chelate effect? Give an example.
Medium
View Solution$Ag^{+} + NH_3 \rightleftharpoons [Ag(NH_3)]^{+}$; $k_1 = 3.5 \times 10^{-3}$
$[Ag(NH_3)]^{+} + NH_3 \rightleftharpoons [Ag(NH_3)_2]^{+}$; $k_2 = 1.7 \times 10^{-3}$
Then the formation constant of $[Ag(NH_3)_2]^{+}$ is
$[Ag(NH_3)]^{+} + NH_3 \rightleftharpoons [Ag(NH_3)_2]^{+}$; $k_2 = 1.7 \times 10^{-3}$
Then the formation constant of $[Ag(NH_3)_2]^{+}$ is
$CuSO_4$ solution reacts with excess of $KCN$ solution to form:
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