Which of the following is a common characteristic of a covalent compound?

High melting point

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Conducts electricity when it is in the molten state

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Consists of molecules

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Always soluble in water

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Solution

The correct option is B Conducts electricity when it is in the molten state
Characteristic of covalent compounds are:
$1$ Low melting point and boiling point.
$2$ Low enthalpies of fusion and vapourization.
$3$ Soft or brittle solid forms.
$4$ Poor electrical and thermal conductivity. Covalent compound shows more electrical conductivity in molten state.

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Choose the correct answer:
Which of the following is not a common characteristic of an electrovalent compound?
(a) High melting point.
(b) Conducts electricity when molten.
(c) Consists of oppositely charged ions.
(d) Ionises when dissolved in water.

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. Which one of the following property is generally not exhibited by ionic compounds?
(a) solubility in water
(b) electrical conductivity in solid state
(c) high melting and boiling points
(d) electrical conductivity in molten state

Question 10
Which one of the following properties is not generally exhibited by ionic compounds?
(a) Solubility in water.
(b) Electrical conductivity in solid state.
(c) High melting and boiling points.
(d) Electrical conductivity in molten state.

S i O_{2}

is a covalent solid. Which of the following is most likely to be true regarding

S i O_{2}

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