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प्रश्न
Complete and balance the following chemical equations
`Fe^(2+) + MnO_4^(-) + H^+ ->`
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उत्तर
`5Fe^(2+) + MnO_4^(-) + 8H^(+) -> 5Fe^(3+) + Mn^(2+) + 4H_2O`
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संबंधित प्रश्न
Account for the following:
Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows oxidation state of +4.
Why do the transition elements have higher enthalpies of atomisation?
Explain briefly how +2 state becomes more and more stable in the first half of the first row transition elements with increasing atomic number?
For M2+/M and M3+/M2+ systems, the EΘ 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+.
Predict which of the following will be coloured in the aqueous solution?
Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reasons for each.
Calculate the number of unpaired electrons in the following gaseous ions:
Mn3+, Cr3+, V3+ and Ti3+. Which one of these is the most stable in an aqueous solution?
Give reasons Iron has the higher enthalpy of atomization than that of copper.
The element with atomic number 46 belongs to
Account for the following:
Transition metals form alloys.
Which property of transition metals enables them to behave as catalysts?
