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Q.

Fe is precipitated as Fe(OH)3 and   not Fe(OH)2 because

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a

None

b

Fe(OH)2 is not ppt as it is soluble

c

Fe(OH)3is soluble

d

Fe(OH)2 is insoluble

answer is A.

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Detailed Solution

The value of Ksp​  for Fe(OH)3​ is lower than that of Fe(OH)2​, therefore its solubility is negligible compared to Fe(OH)2​.

Therefore Iron is precipitated as Fe(OH)3​ and not as Fe(OH)2​.


 

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