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Q.

Gold can exhibit the oxidation states

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a

+ I and + II

b

+ II and + IV

c

+ II and + III

d

+ I and + III

answer is C.

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Detailed Solution

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  • The most common oxidation states of gold are +1 and +3
  • This means it donates either 1 or 3 electrons to form stable compounds. 
  • For example, in AuCl3 , chloride ions have a -1 oxidation state so gold will have Au + 3(-1) = 0, so gold will have +3 oxidation state.
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