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D and F Block Elements question

2016 · 9 Apr · Shift 1 · Q9
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D and F Block Elements question

2016 · 9 Apr · Shift 1 · Q9

JEE MainChemistryD and F Block ElementsMCQ+4 / −1
Which one of the following species is stable in aqueous solution?
  1. A
    Cr2+Cr^{2+}Cr2+
  2. B
    Cu+Cu^+Cu+
  3. C
    MnO 43−_4^{3 - }43−​
  4. D
    MnO 42−_4^{2 - }42−​
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