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Grade: 12
        
Give reasons for the following :
(i) Compounds of transition elements are generally coloured.
(ii) MnO is basic while Mn2O7 is acidic.
2 years ago

Answers : (1)

Arun
23357 Points
							
Dear student
Transition elements have partially filledd orbitals. We also know that when electrons jump from one orbital to another light is emitted due to which the compounds of transition elements seem to be colored compounds.
 

Generally, for transition metal oxides, the lowest oxidation state is the most basic, since it can donate lone pairs of electrons and function as a Lewis base. Higher oxidation states are short of electrons, meaning they can accept lone pairs and function as Lewis acids.

MnO has the lowest oxidation state, so it is the most basic. Mn2O3 is next, then MnO2, and finally Mn2O7 (which is actually acidic).

 

Regards

Arun (askIITians forum expert)

2 years ago
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