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JIPMER 2016
Exam
JIPMER
Year
2016
Subject
Chemistry
Chapter
Coordination Compounds

JIPMER 2016 · Chemistry · Coordination Compounds

[CuCl_4]^ 2- exists while [Cul_4]^ 2- does not exist, because

[CuCl4]2−\left[\mathrm{CuCl}_4\right]^{2-} exists while [Cul4]2−\left[\mathrm{Cul}_4\right]^{2-} does not exist, because

Options

  1. AI−\mathrm{I}^{-}is stronger reductant than Cl−\mathrm{Cl}^{-}
  2. BI−\mathrm{I}^{-}is weaker reductant than Cl−\mathrm{Cl}^{-}
  3. CI−\mathrm{I}^{-}is stronger oxidant than Cl−\mathrm{Cl}^{-}
  4. DNone of the above

Correct answer

A. I−\mathrm{I}^{-}is stronger reductant than Cl−\mathrm{Cl}^{-}

Step-by-step solution

AsI- is stronger reducing agent, i.e., reductant than Cl−\mathrm{Cl}^{-} and reduces Cu2+\mathrm{Cu}^{2+} into Cul and itself is oxidised into I2\mathrm{I}_2. Cl−\mathrm{Cl}^{-}is not that much strong reducing agent and does not reduce Cu2+\mathrm{Cu}^{2+}. Therefore, [CuCl4]2−\left[\mathrm{CuCl}_4\right]^{2-} exists but [CuCl4]2−\left[\mathrm{CuCl}_4\right]^{2-} does not.
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