JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Among

\mathrm{Zn}(\mathrm{OH})_2, \mathrm{Sn}(\mathrm{OH})_2, \mathrm{Cu}(\mathrm{OH})_2, \mathrm{Fe}(\mathrm{OH})_3, \mathrm{~Pb}(\mathrm{OH})_2, \mathrm{Al}(\mathrm{OH})_3

The number of hydroxides which are soluble in excess of

\mathrm{NaOH}

solution is

View answer and explanation

Correct option: A

Option A (4) is correct because Zn(OH)₂, Sn(OH)₂, Pb(OH)₂, and Al(OH)₃ are amphoteric hydroxides and thus soluble in excess NaOH.

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