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प्रश्न
What are the transition elements? Write two characteristics of the transition elements.
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उत्तर
Elements that possess incompletely filled d-orbitals either in their ground state or in any of their oxidation states are known as transition elements. The name ‘transition’ given to the elements of d-block is only because of their position between s-block and p-block elements.
Characteristics of transition elements are as follows:-
- They show paramagnetic behaviour.
- They show variable oxidation states.
- They exhibit catalytic properties.
- They generally form complex compounds.
- They generally form coloured compounds.
Disclaimer: Any two of the above-mentioned characteristics can be mentioned in the answer.
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संबंधित प्रश्न
To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements? Illustrate your answer with examples.
How would you account for the following:
Cobalt (II) is stable in aqueous solutions, but in the presence of complexing reagents, it is easily oxidised.
The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of Cr3+ ion is ______.
Which of the following statements is not correct?
Assertion: Separation of \[\ce{Zr}\] and \[\ce{Hf}\] is difficult.
Reason: Because \[\ce{Zr}\] and \[\ce{Hf}\] lie in the same group of the periodic table.
Account for the following:
In case of transition elements, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number.
Which of the following maxm magnetic moment?
The complex showing a spin-span magnetic moment of 2.82 B.M. is :-
Complete the following reaction and justify that it is a disproportionation reaction:
\[\ce{3MnO^{2-}4 + 4H^+ -> \underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{} + 2H2O}\]
‘Spin only’ magnetic moment is the same for which of the following ions?
- Ti3+
- Cr2+
- Mn2+
- Fe2+
- Sc3+
Choose the most appropriate answer from the options given below:
