Question
Match the complex ions given in Column I with the colours given in Column II and assign the correct code:
 
Column I (Complex ion)
 
Column II (Colour)
$a.$
$[Co(NH_3)_6]^{3+}$
$1.$
Violet
$b.$
$[Ti(H_2O)_6]^{3+}$
$2.$
Green
$c.$
$[Ni(H_2O)_6]^{2+}$
$3.$
Pale blue
$d.$
$[Ni(H_2O)_4(en)]^{2+} (aq)$
$4.$
Yellowish orange
 
 
$5.$
Blue
Code:
  1. $A (1), B (2), C (4), D (5).$
  2. $A (4), B (3), C (2), D (1).$
  3. $A (3), B (2), C (4), D (1).$
  4. $A (4), B (1), C (2), D (3).$

Answer

  1. $A (4), B (1), C (2), D (3).$
 
Column I (Complex ion)
 
Column II (Colour)
$a.$
$[Co(NH_3)_6]^{3+}$
$4.$
Yellowish orange
$b.$
$[Ti(H_2O)_6]^{3+}$
$1.$
Violet
$c.$
$[Ni(H_2O)_6]^{2+}$
$2.$
Green
$d.$
$[Ni(H_2O)_4(en)]^{2+} (aq)$
$3.$
Pale blue

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