Which of the following statements regarding ionic compounds is not true?

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They consist of ions

They are good conductors of electricity at room temperature

They are always more soluble in polar solvents than covalent compounds

They generally have high melting and boiling points

answer is A.

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Detailed Solution

Due to the strong electrostatic attraction between oppositely charged ions, ionic compounds have high melting and boiling points.
They lack free ions in the solid state at ambient temperature, making them a poor conductor of electricity. Ionic compounds are good conductor of electricity in aqueous solution.
In general, electrovalent substances are soluble in water but insoluble in solvents like gasoline.

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