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metals and non-metals — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencemetals and non-metals3 Marks
Question
Write a note on - "Properties of ionic compound." (Here we don't need to describe the experiment but need to give detailed explaination of their properties.)
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Answer

Properties of ionic compound can be explained as follows.
(1) Physical nature
→ Ionic compounds are solids and are some what hard because of the strong force of attraction between the positive and negative ions.
→ These compounds are generally brittle and break in to pieces when pressure is applied.
(2) Melting point and Boiling Points.
→ Ionic compounds have high $M.P$ and $B.P$. Because considerable amount of energy is required to break the strong inter - ionic attraction.
(3) Solubility :
→ Electrovalent compounds are generally Soluble in water and insoluble in solvents such as kerosene and petrol.
(4) Conduction of Electricity :
→ The conduction of electricity through a solution 6 depends upon the movement of charged particles.
→ A solution of an ionic compound in water contains ions, which move to the opposite electrodes when electricity is passed through the solution.
→ lonic compound in solid state don't conduct electricity. because movement of ions in the solid is not possible due to their rigid structure.
→ Ionic compound in molten state conduct electricity. Because the electrostatic forces of attraction between the oppositely charged ions are overcome due to the heat.
Thus, the ions move freely and conduct electricity.

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