1. Tardigrade
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  3. Chemistry
  4. If NaOH is added to an aqueous solution of zinc ions, a white precipitate appears and on adding excess of NaOH , the precipitate dissolves. In this solution zinc exist in the

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Q. If $ NaOH $ is added to an aqueous solution of zinc ions, a white precipitate appears and on adding excess of $ NaOH $ , the precipitate dissolves. In this solution zinc exist in the

JamiaJamia 2011

Solution:

$ Z{{n}^{2+}}+2O{{H}^{-}}\xrightarrow[{}]{{}}Zn{{(OH)}_{2}}\downarrow $ $ Zn{{(OH)}_{2}}(s)+2O{{H}^{-}}(aq)\xrightarrow[{}]{{}}ZnO_{2}^{2-}(aq) $ $ +2{{H}_{2}}O(l) $