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Q.

Aluminium hydroxide is soluble in excess of sodium hydroxide forming the ion

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a

${AlO}_{2}^{+ 3}$

b

${AlO}_{2}^{- 3}$

c

${AlO}_{2}^{-}$

d

${AlO}_{3}^{-}$

answer is C.

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Detailed Solution

${AlO}_{2}^{-}$

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