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Question
A pale green crystalline metal salt of M dissolves freely in water. On standing it gives a brown ppt. on addition of aqueous NaOH. The metal salt solution also gives a black ppt. on bubbling H2S in basic medium. An aqueous solution of the metal salt decolourizes the pink colour of the permanganate solution. The metal in the metal salt solution is :
A pale green crystalline metal salt of M dissolves freely in water. On standing it gives a brown ppt. on addition of aqueous NaOH. The metal salt solution also gives a black ppt. on bubbling H2S in basic medium. An aqueous solution of the metal salt decolourizes the pink colour of the permanganate solution. The metal in the metal salt solution is :
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Solution
The correct option is D Iron
The metal in the metal salt solution is iron.
The pale green crystalline metal salt is ferrous sulphate. It dissolves freely in water. On standing it gives a brown ppt. of basic ferric sulphate Fe(OH)(SO4)
4FeSO4+2H2O+O2→4Fe(OH)(SO4)
The metal salt solution also gives a black ppt. on bubbling H2S in basic medium.
An aqueous solution of the metal salt decolourizes the pink colour of the permanganate solution.
2KMnO4+8H2SO4+10FeSO4→K2SO4+2MnSO4+5Fe2(SO4)3+8H2O
The metal in the metal salt solution is iron.
The pale green crystalline metal salt is ferrous sulphate. It dissolves freely in water. On standing it gives a brown ppt. of basic ferric sulphate Fe(OH)(SO4)
4FeSO4+2H2O+O2→4Fe(OH)(SO4)
The metal salt solution also gives a black ppt. on bubbling H2S in basic medium.
An aqueous solution of the metal salt decolourizes the pink colour of the permanganate solution.
2KMnO4+8H2SO4+10FeSO4→K2SO4+2MnSO4+5Fe2(SO4)3+8H2O
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