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Intermolecular Forces

In a crystal ...

Question

In a crystal cations and anions are held together by

A

Electrons

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B

Electrostatic forces

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C

Nuclear forces

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D

Covalent bonds

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Solution

The correct option is B
Electrostatic forces

In electrovalent crystal has cation and anion are attached by electrostatic forces.

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Q. Chemical compounds in which anions and cations are held together by electrostatic force of attraction are known as ionic compounds. Cations and anions are charged species which are formed by losing and gaining electron(s) respectively to attain the nearest noble gas configuration or stability. Usually metals lose their valence electrons to form cations while non-metals accept electrons and form anions. Being held by a strong electrostatic force of attraction between ions, ionic compounds have high melting and boiling points.

(i) Which of the following electronic configuration is correct for the given elements?

Q. In a crystal, cations and anions are held together by:

In a crystal, cations and anions are held together by

Q. Chemical compounds in which anions and cations are held together by electrostatic force of attraction are known as ionic compounds. Cations and anions are charged species which are formed by losing and gaining electron(s) respectively to attain the nearest noble gas configuration or stability. Usually metals lose their valence electrons to form cations while non-metals accept electrons and form anions. Being held by a strong electrostatic force of attraction between ions, ionic compounds have high melting and boiling points.

(iii) To form an ionic compound Z, element Y accepts two electrons from X. Which of the following properties is not shown by Z?

Iodine molecules are held in the crystals lattice by ..............

(a) London forces (b) dipole-dipole interacions

(c) Covalent bonds (d) coulombic forces

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