Out of Ca2+ , Al3+ , Bi3+ , Mg2+ , Fe3+ and Zn2+ the reagents NH4Cl and aqueous NH3 will precipitate
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a
Ca2+ , Al3+
b
Al3+ , Fe3+
c
Bi3+ , Mg2+
d
Mg2+, Zn2+
answer is B.
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Detailed Solution
Al+3 and Fe+3 ions will precipitate as coresponding hydroxide when NH4OH and NH4Cl is addedGroup III cations (Al+3, Cr+3, Fe+3) are precipitated as hydroxides by NH4Cl with NH4OH.