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Chemistry
Which of the following statements is not correct?
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Q. Which of the following statements is not correct?
The d-and f-Block Elements
A
Copper liberates hydrogen from acids
77%
B
In higher oxidation states, manganese forms stable compounds with oxygen and fluorine
19%
C
$Mn^{3+}$ and $Co^{3+}$ are oxidising agents in aqueous solution
4%
D
$Ti^{2+}$ and $Cr^{2+}$ are reducing agents in aqueous solution
0%
Solution:
Positive $E^°$ value of copper accounts for its inability to liberate $H_2$ from acids.