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Q.

I.ZnSO4(aq)+2NH4OH(aq)Zn(OH)2(s)+NH42SO4(aq)                                                                              A
II.FeCl3(aq)+3NH4OH(aq)Fe2O3xH2O(s)+NH4Cl(aq)                                                                      B
       The colours of compounds A and B respectively are

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a

brown and white

b

brown and brown

c

white and brown

d

white and white

answer is C.

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Detailed Solution

(i) ZnSO4(aq)+2NH4OH(aq)Zn(OH)2(s)+NH42SO4(aq)(white ppt. )
(ii) FeCl3(aq)+NH4OH(aq)Fe2O3xH2O(s) +NH4Cl(aq) (Brown ppt.) 
 

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