Question:
Which of the following statements is not correct?
(i) Copper liberates hydrogen from acids.
(ii) In its higher oxidation states, manganese forms stable compounds with
oxygen and fluorine.
(iii) Mn3+ and Co3+ are oxidising agents in aqueous solution.
(iv) Ti2+ and Cr2+ are reducing agents in aqueous solution.
Solution:
Option (i) Copper liberates hydrogen from acids is the answer.
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