The atomic ratio of isomorphs of ZnSO4, and NiSO4 is _.
Correct answer: C. 1:1:4
- A. 2:1
- B. 2:1:4
- C. 1:1:4
- D. 1:1
Explanation
The term isomorph means when two different substances have the same crystalline shape. Their atomic ratio is calculated by looking at the number of atoms present in the molecules. So if we see, ZnSO4 has 1 atom of zinc, 1 atom of sulphur, and 4 atoms of oxygen so the ratio will be 1:1:4 and as both substances have the same crystalline shape, the same ratio will be for NiSO4. Thus the answer is C.
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About Shape of Ionic Crystals
Ionic crystal shape depends on the regular arrangement of oppositely charged ions in a three-dimensional lattice. The topic covers coordination number, radius ratios, lattice geometry and structures such as sodium chloride, caesium chloride and zinc sulfide, which should not be confused with the molecular shapes predicted by VSEPR theory.
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