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JEE Main 20249 AprilMorning Shift
Exam
JEE Main
Year
2024
Date
9 April
Shift
Morning Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2024 · 9 April · Morning Shift · Chemistry · d and f Block Elements

lectronic configuration of ( Cu( II ) ) is (3 ~d^ 9) whereas that...

lectronic configuration of (Cu(\mathrm{Cu}(\mathrm{II}))) is (3 \mathrm{~d}^9) whereas that of (Cu(\mathrm{Cu}(\mathrm{I}))) is (3  d10\mathrm{~d}^{10}). Which of the following is correct?

Options

  1. AStability of (\mathrm{Cu}(I\mathrm{I})) and (\mathrm{Cu}(II\mathrm{II})) depends on nature of copper salts
  2. B(\mathrm{Cu}(II\mathrm{II})) is more stable
  3. C(\mathrm{Cu}(I\mathrm{I})) and (\mathrm{Cu}(II\mathrm{II})) are equally stable
  4. D(\mathrm{Cu}) (II) is less stable

Correct answer

B. (\mathrm{Cu}(II\mathrm{II})) is more stable

Step-by-step solution

Cu(\mathrm{Cu}(\mathrm{II})) is more stable than Cu(\mathrm{Cu}(\mathrm{I})) because hydration energy of Cu+2\mathrm{Cu}^{+2} ion compensate IE2\mathrm{IE}_2 of Cu\mathrm{Cu}.
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