Which of the following is an alum?

N a A l O_{2}

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N a_{2} S O_{4} \cdot A l_{2} (S O_{4})_{3} \cdot 24 H_{2} O

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K C l \cdot M g C l_{2} \cdot 6 H_{2} O

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F e S O_{4} \cdot (N H_{4})_{2} S O_{4} \cdot 6 H_{2} O

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Solution

The correct option is D $N a_{2} S O_{4} \cdot A l_{2} (S O_{4})_{3} \cdot 24 H_{2} O$
Alum is double sulphate of trivalent metal like iron, aluminium, chromium etc. and a univalent metal such as potassium or sodium with molecules of water.

e.g. $N a_{2} S O_{4} \cdot A l_{2} (S O_{4})_{3} \cdot 24 H_{2} O$

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Which of the following is an example of coordination compound? a)CoCl₃.6NH₃b)KCl.MgCl₂.6H₂O c)FeSO₄.6H₂O d)FeSO₄.(NH₄)₂SO₄.6H₂O

F e S O_{4} \cdot (N H_{4})_{2} S O_{4} \cdot 6 H_{2} O

F e

F e S O_{4}

(N H_{4})_{2} S O_{4}

6 H_{2} O

The oxidation state of $F e$ in $F e S O_{4}$ . $(N H_{4})_{2} S O_{4}$ . $6 H_{2} O$ is

K C l \cdot M g C l_{2} \cdot 6 H_{2} O

If true enter 1,if false enter 0

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