Question

Which among the following pairs of compounds is not isomorphous?

Options

• NaNO₃ and CaCO₃

• K₂SO₄ and K₂SeO₄

• NaCl and KCl

• NaF and MgO

Answer 1

NaCl and KCl

Explanation:

Isomorphous substances have chemical formulae that are often similar, and their polarizability and anion-cation radii ratios are usually identical. Isomorphous material crystals are nearly identical. Because they have different crystal structures, NaCl and KCl are not isomorphous among the specified pair of molecules.