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Question
Which property of transition metals enables them to behave as catalysts?
Options
High melting point
High ionisation enthalpy
Alloy formation
Variable oxidation states
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Solution
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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RELATED QUESTIONS
What are alloys?
Dissociation of H2S is suppressed in acidic medium.
Electronic configuration of Mn2+ is ____________.
Transition elements show magnetic moment due to spin and orbital motion of electrons. Which of the following metallic ions have almost same spin only magnetic moment?
(i) \[\ce{Co^{2+}}\]
(ii) \[\ce{Cr^{2+}}\]
(iii) \[\ce{Mn^{2+}}\]
(iv) \[\ce{Cr^{3+}}\]
On strong heating AgNO3, the gases evolved are:-
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Match List - I with List - II.
| List - I | List - II | ||
| (A) | [Fe(CN)6]3− | (i) | 5.92 BM |
| (B) | [Fe(H2O)6]3+ | (ii) | 0 BM |
| (C) | [Fe(CN)6]4− | (iii) | 4.90 BM |
| (D) | [Fe(H2O)6]2+ | (iv) | 1.73 BM |
Choose the correct answer from the options given below.
The electrode potential of M2+/M of 3d-series elements shows the positive value for ______.
Assertion (A): Transition metals show their highest oxidation state with oxygen.
Reason (R): The ability of oxygen to form multiple bonds to metals.
The E° value for the Mn2+/Mn2+ couple is more positive than that of Cr3+/Cr2+ or Fe3+/Fe2+ due to the change of:
