A) \[FeS{{O}_{4}}{{(N{{H}_{4}})}_{2}}S{{O}_{4}}.6{{H}_{2}}O\]
B) \[FeS{{O}_{4}}{{(N{{H}_{3}})}_{2}}S{{O}_{4}}.6{{H}_{2}}O\]
C) \[{{K}_{2}}S{{O}_{4}}A{{l}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\]
D) \[FeS{{O}_{2}}{{(N{{H}_{2}})}_{4}}S{{O}_{4}}.6{{H}_{2}}O\]
Correct Answer: A
Solution :
Mohrs salt is chemically ferrous ammonium sulphate \[(FeS{{O}_{4}}.{{(N{{H}_{4}})}_{2}}S{{O}_{4}}.6{{H}_{2}}O)\]. \[{{K}_{2}}S{{O}_{4}}A{{l}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\] is potash alum. It is used in purification of water.
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