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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
In what way is the electronic configuration of the transition elements different from that of the non-transition elements?
Following are the transition metal ions of 3d series:
Ti4+, V2+, Mn3+, Cr3+
(Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24)
Answer the following:
1) Which ion is most stable in an aqueous solution and why?
2) Which ion is a strong oxidising agent and why?
3) Which ion is colourless and why?
How would you account for the following?
Transition metals and their compounds act as catalysts.
Explain why Mn2+ is more stable than Fe2+ towards oxidation to +3 state. (At. no. of Mn = 25, Fe = 26)
When \[\ce{KMnO4}\] solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because ______.
Which of the following ions show higher spin only magnetic moment value?
(i) \[\ce{Ti^3+}\]
(ii) \[\ce{Mn2+}\]
(iii) \[\ce{Fe2+}\]
(iv) \[\ce{Co3+}\]
Why EΘ values for Mn, Ni and Zn are more negative than expected?
Although fluorine is more electronegative than oxygen, but the ability of oxygen to stabilise higher oxidation states exceeds that of fluorine. Why?
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