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Question

Question: Which of the following statement is not true about Mohr's salt....

Which of the following statement is not true about Mohr's salt.

A

It decolourises KMnO4KMnO_{4}

B

It is a primary standard

C

It is a double salt

D

Oxidation state of iron is +3 in this salt

Answer

Oxidation state of iron is +3 in this salt

Explanation

Solution

Oxidation state of iron in mohr’s salt

FeSO4(NH4)2SO4.6H2OFeSO_{4}(NH_{4})_{2}SO_{4}.6H_{2}O is + 2.