(B) In solid $NaCl$,the ions ($Na^+$ and $Cl^-$) are held together by strong electrostatic forces of attraction in a rigid crystal lattice. Because th

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Ions are not mobile in solid $NaCl$.

(B) In solid $NaCl$,the ions ($Na^+$ and $Cl^-$) are held together by strong electrostatic forces of attraction in a rigid crystal lattice. Because these ions are fixed in their positions and are not free to move,they cannot conduct electricity in the solid state. However,in the molten state or in an aqueous solution,the ions become free to move,allowing the substance to conduct electricity.

Class 12 Chemistry Solid State Type of solid and Their properties

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The reason why solid $NaCl$ is a poor conductor of electricity is .......

A
Solid $NaCl$ does not contain ions.
B
Ions are not mobile in solid $NaCl$.
C
Solid $NaCl$ is a covalent solid.
D
Solid $NaCl$ does not contain electrons.

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Class 12 Questions

Class 12

Chemistry Questions

Chapter

Solid State

Subtopic

Type of solid and Their properties

Classify the following materials into superconductors,conductors,semiconductors,and insulators: $Cu$,$Al$,$Si$,$Ge$,glass,Teflon,$Au$,$Pt$,$CuO$ (at low temperature),graphite,carbon black,and alloys at low temperature.

Medium

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Assertion : Stability of a crystal is reflected in the magnitude of its melting point.
Reason : The stability of a crystal depends upon the strength of the interparticle attractive force.

DifficultAIIMS 2009

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Explain:
$(i)$ The basis of similarities and differences between metallic and ionic crystals.
$(ii)$ Why are ionic solids hard and brittle?

Easy

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The ability of a given substance to assume two or more crystalline structures is called:

Medium

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Most crystals exhibit good cleavage because their constituent atoms,molecules,or ions are arranged in:

Easy

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The reason why solid $NaCl$ is a poor conductor of electricity is .......

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Classify the following materials into superconductors,conductors,semiconductors,and insulators: $Cu$,$Al$,$Si$,$Ge$,glass,Teflon,$Au$,$Pt$,$CuO$ (at low temperature),graphite,carbon black,and alloys at low temperature.

Assertion : Stability of a crystal is reflected in the magnitude of its melting point.Reason : The stability of a crystal depends upon the strength of the interparticle attractive force.

Explain:$(i)$ The basis of similarities and differences between metallic and ionic crystals.$(ii)$ Why are ionic solids hard and brittle?

The ability of a given substance to assume two or more crystalline structures is called:

Most crystals exhibit good cleavage because their constituent atoms,molecules,or ions are arranged in:

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Assertion : Stability of a crystal is reflected in the magnitude of its melting point.
Reason : The stability of a crystal depends upon the strength of the interparticle attractive force.

Explain:
$(i)$ The basis of similarities and differences between metallic and ionic crystals.
$(ii)$ Why are ionic solids hard and brittle?