Question

Which of the following compounds is amphoteric?

• A. $Cr{\left(OH\right)}_2$
• B. $Fe{\left(OH\right)}_2$
• C. $Cr{\left(OH\right)}_3$
• D. $Fe{\left(OH\right)}_3$

Answer 1

The correct option is C $Cr{\left(OH\right)}_3$

$Cr(OH{)}_3$ reacts with bases (hydroxide ions) to give $\left[Cr\right(OH{)}_6{]}^{3-}$. It also reacts with acids (hydrogen ions) to give $\left[Cr\right(H_{2}O{)}_6{]}^{3+}$

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

Thus,option C is correct.