Which of the following pairs is isomorphous
a) FeSO4 . 7H2O and CuSO4 . 5H2O b) FeSO4 . 7H2O and ZnSO4 . 7 H2O
c) FeSO4.7H2O and MnSO4 . 4H2O d) CuSO4. 5H2O and MnSO4 . 4H2O
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Question:
Which of the following pairs is isomorphous
a) FeSO₄ . 7H₂O and CuSO₄ . 5H₂O
b) FeSO₄ . 7H₂O and ZnSO₄ . 7 H₂O
c) FeSO₄.7H₂O and MnSO₄ . 4H₂O
d) CuSO₄. 5H₂O and MnSO₄ . 4H₂O
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Answer and explanation:
What is an isomorphous substance?
Isomorphous substances usually have similar chemical formulas, and the polarizability and ratio of anion and cation radii are generally comparable
your answer is: FeSO₄ . 7H₂O and ZnSO₄ . 7 H₂O , because they have same degree of hydration viz. 7H2O molecules
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The pair which is isomorphous - . 7 and . 7 (Option b)
- Isomorphous pairs (iso – same, morphous – shape) are two or more substances with the same crystal structure, and the phenomenon is known as isomorphism.
- Here . 7 and . 7 will have the same crystal structures so they are isomorphous.
- Atoms which forms the structures are eventually same as oxygen, hydrogen, sulfur. The Fe and Zn also have some same properties and also belong to same d block elements.
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