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5. Co-ordination chemistry — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry5. Co-ordination chemistry1 Mark
MCQ
Which of the following compound is amphoteric
  • A
    $Cr(OH)_2$
  • B
    $Fe(OH)_2$
  • ✓
    $Cr(OH)_3$
  • D
    $Fe(OH)_3$
✓

Answer

Correct option: C.
$Cr(OH)_3$
c
Cr$(O H)_{3}$ reacts with bases (hydroxide ions) to give $\left[ Cr ( OH )_{6}\right]^{3-} .$ It also reacts with acids (hydrogen ions) to give $\left[ Cr \left( H _{2} O \right)_{6}\right]^{3+}$

Hence,it act as amphoteric dissolve in both acid and base.

Thus,option C is correct.

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