Q.

Which of the following observations/statements is/are correct?

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a

Anhydrous CuSO4 becomes blue in aqueous medium due to the complex formation

b

Ni(CN)2 dissolves in KCN giving an orange-red solution

c

Fe(OH)3 can be precipitated by adding NH4OH to K3[Fe(CN)6]

d

None of the above

answer is A.

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Detailed Solution

Anhydrous CuSO4 become blue in aqueous medium due to the complex formation.CuSO4+4NH3→CuNH34+2
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Which of the following observations/statements is/are correct?