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प्रश्न
Which property of transition metals enables them to behave as catalysts?
पर्याय
High melting point
High ionisation enthalpy
Alloy formation
Variable oxidation states
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उत्तर
Variable oxidation states
Explanation:
Because transition metals have partially full d-orbitals, they can easily extract electrons from or donate electrons to reagents, depending on the nature of the reaction.
They also have a high number of oxidation states and the potential to form complexes, making them excellent catalysts.
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संबंधित प्रश्न
The elements of 3d transition series are given as: Sc Ti V Cr Mn Fe Co
Answer the following: Which element is a strong oxidising agent in +3 oxidation state and why?
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 is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples.
Describe the oxidising action of potassium dichromate and write the ionic equation for its reaction with iodide.
What is meant by ‘disproportionation’?
Which of the following will not act as oxidising agents?
(i) \[\ce{CrO3}\]
(ii) \[\ce{MoO3}\]
(iii) \[\ce{WO3}\]
(iv) \[\ce{CrO^{2-}4}\]
Match the properties given in Column I with the metals given in Column II.
| Column I (Property) | Column II (Metal) | |
| (i) | Element with highest second ionisation enthalpy |
(a) \[\ce{Co}\] |
| (ii) | Element with highest third ionisation enthalpy |
(b) \[\ce{Cr}\] |
| (iii) | \[\ce{M}\] in \[\ce{M(CO)6}\] is | (c) \[\ce{Cu}\] |
| (iv) | Element with highest heat of atomisation |
(d) \[\ce{Zn}\] |
| (e) \[\ce{Ni}\] |
Which of the following ions will exhibit colour in aqueous solution?
Which of the following ions acts as a typical transition metal ion?
Account for the following:
Eu2+ with electronic configuration [Xe]4f76s2 is a strong reducing agent.
