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प्रश्न
Account for the following:
Ce4+ is a strong oxidising agent.
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उत्तर
Ce4+ is a good oxidising agent because it reverts to the +3 oxidation state in an aqueous medium.
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संबंधित प्रश्न
Which is a stronger reducing agent, Cr2+ or Fe2+ and why?
For M2+/M and M3+/M2+ systems, the E° values for some metals are as follows:
| Cr2+/Cr | −0.9 V |
| Mn2+/Mn | −1.2 V |
| Fe2+/Fe | −0.4 V |
| Cr3/Cr2+ | −0.4 V |
| Mn3+/Mn2+ | +1.5 V |
| Fe3+/Fe2+ | +0.8 V |
Use this data to comment upon:
- The stability of Fe3+ in acid solution as compared to that of Cr3+ or Mn3+ and
- the ease with which iron can be oxidised as compared to a similar process for either chromium or manganese metal.
Predict which of the following will be coloured in the aqueous solution?
Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reasons for each.
Complete and balance the following chemical equations
`Fe^(2+) + MnO_4^(-) + H^+ ->`
Give reasons Iron has the higher enthalpy of atomization than that of copper.
Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number?
The product of oxidation of I– with \[\ce{MnO^{-}4}\] in alkaline medium is:-
The complex showing a spin-span magnetic moment of 2.82 B.M. is :-
The given graph shows the trends in melting points of transition metals:
Explain the reason why Cr has the highest melting point and manganese (Mn) has a lower melting point.
A transition element X has an electronic configuration [Ar]4s23d3. Predict its likely oxidation states.
