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प्रश्न
How would you account for the following: Transition metals form complex compounds.
Account for the following:
Transition metals form a large number of complexes.
Account for the following:
Transition metals form large number of complex compounds.
Give reasons for the following:
Transition elements form complex compounds.
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उत्तर १
The transition elements form complexes because they are able to accept pairs of electrons from donor molecules or ions to form dative covalent bonds. This happens because they have vacant orbitals of suitable energy which can accept the non-bonding pairs from the ligands.
उत्तर २
The transition elements form complexes because of the following reasons:
- Comparatively smaller size of their metal ions.
- Their high ionic charges.
- Availability of vacant d-orbitals so that these orbitals can accept lone pairs of electrons donated by the ligands.
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संबंधित प्रश्न
Which of the d-block elements may not be regarded as the transition elements?
Compare the stability of +2 oxidation state for the elements of the first transition series.
Give reasons Iron has the higher enthalpy of atomization than that of copper.
Assertion: \[\ce{Cu^2+}\] iodide is not known.
Reason: \[\ce{Cu^2+}\] oxidises \[\ce{I^-}\] to iodine.
Assertion (A): Cu cannot liberate hydrogen from acids.
Reason (R): Because it has positive electrode potential.
Which of the following statements is not correct?
Assertion (A): Transition metals have high enthalpy of atomisation.
Reason (R): Greater number of unpaired electrons in transition metals results in weak metallic bonding.
Write the ionic equation for reaction of KI with acidified KMnO4.
Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:
Atomic sizes
The E° value for the Mn2+/Mn2+ couple is more positive than that of Cr3+/Cr2+ or Fe3+/Fe2+ due to the change of:
