The reaction of dilute $\mathrm{NaOH}$ with $\mathrm{Zn(NO_3)_2}$ gives a precipitate that is—

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The reaction of dilute NaOH\mathrm{NaOH}NaOH with Zn(NO3)2\mathrm{Zn(NO_3)_2}Zn(NO3​)2​ gives a precipitate that is—