Solid $C O_{2}$ is an example of:

ionic crystal

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covalent crystal

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metallic crystal

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molecular crystal

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Solution

The correct option is D molecular crystal
Types of Solids Constituent Bonding/Attra-
ctive Force Examples Physical
Nature Electricalconductivity Melting point
1. Molecular
Solids
(i) Non-polar
(ii) Polar
(iii) Hydrogen
bonded Molecules Dispersion or
London forces
Dipole - dipole
interactions
hydrogen
bodning $A r, C C l_{4},$
$H_{2} l_{2}, C O_{2}$
$H C l, S O_{2}$
$H_{2} O$ (ice) SoftSoft
Hard Insulator
Insulator
Insulator Very low
Low
Low
2. Ionic solids lons Coulombic or
electrostatic $N a C l, M g O, Z n S, C a F_{2}$ Hard but
britte Innsulator s in
solid state but
consuctors in
molten state
and in
aqueous
solutions High
3. Metallic
solids Positive ions in a sea of
delocallised
electorns Metallic
bonding $F e, C u, A g M g$ Hard but malleable
and suctile Conductrons
in solid state as well as in
molten state Fairly high

4. Covalent or
network solids Covalent or
network
solids atoms Covalent
bonding $S i O_{2}$ (quart-z) SiC,C
(diamond),
AIN
C(graphite) Hard
Soft Insulators
Condutor
(exception)

Suggest Corrections

Types of Solids	Constituent	Bonding/Attra- ctive Force	Examples	Physical Nature	Electricalconductivity	Melting point
1. Molecular Solids (i) Non-polar (ii) Polar (iii) Hydrogen bonded	Molecules	Dispersion or London forces Dipole - dipole interactions hydrogen bodning	$A r, C C l_{4},$ $H_{2} l_{2}, C O_{2}$ $H C l, S O_{2}$ $H_{2} O$ (ice)	SoftSoft Hard	Insulator Insulator Insulator	Very low Low Low
2. Ionic solids	lons	Coulombic or electrostatic	$N a C l, M g O, Z n S, C a F_{2}$	Hard but britte	Innsulator s in solid state but consuctors in molten state and in aqueous solutions	High
3. Metallic solids	Positive ions in a sea of delocallised electorns	Metallic bonding	$F e, C u, A g M g$	Hard but malleable and suctile	Conductrons in solid state as well as in molten state	Fairly high
4. Covalent or network solids	Covalent or network solids	atoms	Covalent bonding	$S i O_{2}$ (quart-z) SiC,C (diamond), AIN C(graphite)	Hard Soft	Insulators Condutor (exception)