Which of the following statements regarding copper salts is not true?

  • A

    Copper $(I)$ disproportionates to copper and copper $(II)$ ion in aqueous solution

  • B

    Copper $(I)$ can be stablised by the formation of insoluble complex compounds such as $CuCl_2^-$ and $Cu(CN)_2^-$

  • C

    Copper $(II)$ oxide is red powder

  • D

    None of these

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  • [KVPY 2015]

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