Most ionic compounds have :

high melting points and low boiling points

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high melting points and nondirectional bonds

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high solubilities in polar solvents and low solubilities in nonpolar solvents

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three-dimentional network structures, and are good conductors of electricity in the molten state

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Solution

The correct options are
B high melting points and nondirectional bonds
C three-dimentional network structures, and are good conductors of electricity in the molten state
D high solubilities in polar solvents and low solubilities in nonpolar solvents
The chemical bond formed between two or more atoms as a result of the complete transfer of one or more electrons from one atom to another is called Ionic or electrovalent bond. Ionic compounds have high boiling point and melting point due to strong electrostatic force of attraction among oppositely charged ions. In solid state, it does not have free ions and are thus bad conductor of electricity.In fused state or aqueous solution, due to free ions, they are good conductor of electricity. Highly soluble in water(Polar solvents) as like dissolves like.

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Similar questions

Q. Compounds of ________ have a low melting point and are soluble in organic solvents.

Q. Which response includes only the true statements concerning the characteristics of covalent compounds?

I

. These compounds can be gases, liquids, or solids with low melting points.

I I

. Most are soluble in polar solvents.

I I I

. Liquid and molten compounds do not conduct electricity.

I V

. Aqueous solutions of these compounds are very good conductors of electricity.

Q. Choose the correct statements about covalent compounds.
i. Generally, covalent compounds have low melting and boiling points.

ii. Covalent compounds are usually good conductors of electricity.

iii. Covalent compounds are generally soluble in organic solvents like petrol and kerosene.

iv. All covalent compounds are soluble in water.

[1 mark]

Q. The low melting point and the high solubility of

L i C l

in organic solvents is due to:

Explain the following:
(a) Covalent compounds are generally gases or liquids or soft solids.
(b) Covalent compounds have low melting point and boiling point.
(c) Non-polar covalent compounds are insoluble in water.
(d) Polar covalent compounds are good conductors of electricity.

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