Which of these are true about ionic compounds?

Very low melting and boiling points

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Very high melting and boling points

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High melting point but low boiling point

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Low melting point but high boiling point

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Solution

The correct option is B
Very high melting and boling points

Due to the strong force of attraction between the positive and negative ions, ionic compounds have a strong intermolecular force of attraction. Hence a great amount of energy is required to overcome these forces and hence they have very high melting and boiling point.

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Similar questions

(a) Compound X consists of molecules.

Choose the letter corresponding to the correct answer from the options A, B, C and D given below :

(i) The type of bonding in X will be :

A. ionic B. electrovalent

C. covalent D. molecular

(ii) X is likely to have a :

A. low melting point and high boiling point,

B. high melting point and low boiling point,

C. low melting point and low boiling point,

D. high melting point and high boiling point.

(iii) In the liquid state, X will :

A. become ionic,

B. be an electrolyte

C. conduct electricity,

D. not conduct electricity.

(b) Electrons are getting added to an element Y :

(i) is Y getting oxidized or reduced ?

(ii) what charge will Y migrate to during the process of electrolysis ?

Which kind of compounds have very high boiling and melting points?

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