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- #General Principles and Processes of isolation of elements
- #Chemistry Part I Textbook for Class XII
- #NCERT
- #CBSE 12 Class
- #Chemistry
6.23 The choice of a reducing agent in a particular case depends on thermodynamic factor. How far do you agree with this statement? Support your opinion with two examples.
Answers (1)
From the graph we can observe that, a mtal oxide can reduce the oxide of other metals,if the of the first oxide is more than the second oxide.
example- can reduce
to Zn but Zn cannot reduce
because
of
from Mg is more negative.
It can be observed from the above graph that a metal can reduce the oxide of other metals, if the standard free energy of formation of the oxide of the former is more negative than the latter. For example, since
(Al,Al2O3) is more negative than
(Cu, Cu2O), Al can reduce Cu2O to Cu, but Cu cannot reduce Al2O3. Similarly, Mg can reduce ZnO to Zn, but Zn cannot reduce MgO because
(Mg,MgO) is more negative than
(Zn,ZnO).
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