Q.

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.
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