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STD 12 - 4. d and f- block elements — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 4. d and f- block elements4 Marks
MCQ
On adding excess of $N{H_3}$ solution to $CuS{O_4}$ solution, the dark blue colour is due to
  • ✓
    ${\left[ {Cu{{(N{H_3})}_4}} \right]^{ + 2 }}$
  • B
    ${\left[ {Cu{{(N{H_3})}_2}} \right]^{ + 2 }}$
  • C
    ${\left[ {Cu(N{H_3})} \right]^ + }$
  • D
    None of the above
✓

Answer

Correct option: A.
${\left[ {Cu{{(N{H_3})}_4}} \right]^{ + 2 }}$
a
(a)$CuS{O_4} + 4N{H_3}\, \to \,{[Cu{(N{H_3})_4}]^{ + 2 }}SO_4^{ - \, - }$

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