Which of the following will not dissolve in a hot mixture of NaOH and ?

CHEMISTRY · Single correct · CBSE · Chemistry · Metals and Non-metals · Metals and Non-metals

Problem

Which of the following will not dissolve in a hot mixture of NaOH and H2O2\text{H}_2\text{O}_2 ? (1) Fe(OH)3\text{Fe}(\text{OH})_3 (2) Al(OH)3\text{Al}(\text{OH})_3 (3) Cr(OH)3\text{Cr}(\text{OH})_3 (4) Zn(OH)2\text{Zn}(\text{OH})_2

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