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Question
Chemistry
How many of the following are amphoteric oxides? MnO,Mn3O4,Mn2O3,MnO2,Mn2O7
Q. How many of the following are amphoteric oxides?
M
n
O
,
M
n
3
O
4
,
M
n
2
O
3
,
M
n
O
2
,
M
n
2
O
7
528
167
NTA Abhyas
NTA Abhyas 2022
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Answer:
3
Solution:
For oxides of d-block, acidic character increases
with increase in oxidation state of the elements.
Hence,
M
n
O
is a basic oxide.
M
n
3
O
4
,
M
n
2
O
3
and
M
n
O
2
are amphoteric oxides while
M
n
2
O
7
is an acidic oxide.