हिंदी

Complete the following reaction and justify that it is a disproportionation reaction: 3MnOA42−+4HA+⟶――――+――――+2HA2O

Advertisements
Advertisements

प्रश्न

Complete the following reaction and justify that it is a disproportionation reaction:

\[\ce{3MnO^{2-}4 + 4H^+ -> \underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{} + 2H2O}\]

टिप्पणी लिखिए
Advertisements

उत्तर

\[\ce{3MnO^{2-}4 + 4H^+ -> 2MnO^-4 + MnO2 + 2H2O}\]

This is a disproportionation reaction since the same element [Mn] is oxidised and reduced in this process.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2022-2023 (March) Delhi Set 1

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

Write down the number of 3d electrons in the following ion:

Cu2+

Indicate how would you expect the five 3d orbitals to be occupied for this hydrated ion (octahedral).


An analysis shows that FeO has a non-stoichiometric composition with formula Fe0.95O. Give reason.


Why do transition metal ions possess a great tendency to form complexes?


Explain why Zn2+ salts are white whereas Cu2+ salts are coloured.


Explain why Mn2+ is more stable than Fe2+ towards oxidation to +3 state. (At. no. of Mn = 25, Fe = 26)


Read the passage given below and answer the following question:

The transition metals when exposed to oxygen at low and intermediate temperatures form thin, protective oxide films of up to some thousands of Angstroms in thickness. Transition metal oxides lie between the extremes of ionic and covalent binary compounds formed by elements from the left or right side of the periodic table. They range from metallic to semiconducting and deviate by both large and small degrees from stoichiometry. Since electron bonding levels are involved, the cations exist in various valence states and hence give rise to a large number of oxides. The crystal structures are often classified by considering a cubic or hexagonal close-packed lattice of one set of ions with the other set of ions filling the octahedral or tetrahedral interstices. The actual oxide structures, however, generally show departures from such regular arrays due in part to distortions caused by packing of ions of different size and to ligand field effects. These distortions depend not only on the number of d-electrons but also on the valence and the position of the transition metal in a period or group.

In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.

Assertion: Cations of transition elements occur in various valence states.

Reason: Large number of oxides of transition elements are possible.


Assertion: \[\ce{Cu^2+}\] iodide is not known.

Reason: \[\ce{Cu^2+}\] oxidises \[\ce{I^-}\] to iodine.


The element with atomic number 53 belongs to


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.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×