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CBSE
Class 12 Chemistry
The Solid State Chapter 1
Quiz 2
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Which of the following is a non-conductor in solid state but good conductor in molten state?
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Silicon dioxide
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Sodium
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Diamond
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Potassium chloride
Which of the following properties is NOT exhibited by metallic solids?
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Low Boiling Point correct
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Ductility
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Electrical Conductivity
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Malleability
Among the following solids, which one shows the strongest bonding?
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Metallic solids
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Covalent solids
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Ionic solids
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Molecular solids
Why ice is a crystalline compound?
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Because water molecules are arranged in cage like ordered structure.
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Because water is condensed to form solid.
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Because ice melts to form water.
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Because water molecules are arranged in random way.
Which of the following is a covalent crystal?
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Ice
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Rock salt
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Quartz
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Dry ice
Which of the following will melt between 500°C to 1500°C ?
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graphite
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salt
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glass
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sugar
Quartz is:
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Covalent solid
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Molecular solid
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Metallic solid
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Ionic solid
How can anyone differentiate crystalline and amorphous solids?
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On the basis of arrangement of particles.
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On the basis of size of particles.
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On the basis of types of atoms.
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On the basis of number of particles.
The intermolecular forces existing between two non polar molecules are called
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ionic forces
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electrostatic forces
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London or dispersion forces
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dipole-dipole forces
Which of the following is NOT true for solid crystals?
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Solid crystals have fixed positions of the constituent particles.
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Solid crystals have large intermolecular distances.
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Solid crystals have strong intermolecular forces.
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Solid crystals have definite mass and volume.
What will happen if sodium chloride is crystallised with a little amount of strontium chloride?
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It will crystallize more sodium ions.
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It will create metal deficiency.
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It will create anionic vacancy.
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It will create cationic vacancy.
If the anionic site is occupied by an electron and it becomes part of the lattice it is called
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T-centre
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F-centre
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E-centre
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D-centre
A p-type conductor is created on doping silicon with
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Al correct
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P
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As
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C
Which of the following is NOT correct?
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Doping can be done with an impurity which is electron rich or electron deficient.
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Metals conduct electricity in solid as well as molten state.
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Molecular orbitals of the solids are close in energy to each other and form band
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none of the above
In Schottky defect:
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a lattice site is occupied by electron.
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an ion occupies interstitial position between lattice points.
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equal number of cations and anions are missing from the lattice sites.
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the density of solid increases.
Germanium or silicon becomes semiconductor due to
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Frenkel defect
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Schottky defect
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Chemical impurity
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Metal deficiency defect
If germanium is doped with arsenic, what kind of semiconductor will be formed?
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pn-type
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p-type
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n-type
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diode
If the constituent particles are missing from lattice site the defect is called as
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Metal Deficiency.
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Vacancy Defect.
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Substitutional Defect.
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Interstitial Defect.
How many valence electrons are required in impurity, to be added to silicon, to get an an n-type semiconductor?
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3
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1
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2
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5
When can anyone observe the Schottky defect?
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An ion leaves its normal site and occupies an interstitial site.
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Density of the crystal is increased.
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Equal number of cations and anions are missing from the lattice.
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Unequal number of cations and anions are missing from the lattice.
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