JEE Questions for Chemistry The Solid State Quiz 4 - MCQExams.com

Amorphous solids
  • possess sharp melting points
  • undergo clean cleavage when cut with knife
  • do not undergo clean cleavage when cut with knife
  • possess orderly arrangement over long distances
Solid CO2 is an example of
  • Ionic crystal
  • Covalent crystal
  • Metallic crystal
  • Molecular crystal
Which one has highest melting point ?
  • Ionic crystal
  • Molecular crystal
  • Covalent crystal
  • Metallic crystal
Which of the following are the correct axial distances and axial angles for rhombohedral system?

  • Chemistry-The Solid State-8565.png
  • 2)
    Chemistry-The Solid State-8566.png

  • Chemistry-The Solid State-8567.png

  • Chemistry-The Solid State-8568.png
Which of the following does not represent a type of crystal?
  • Isomorphous
  • Triclinic
  • Hexagonal
  • Rhombohedral
The unit cell with the structure given below represents…crystal system
Chemistry-The Solid State-8570.png
  • Cubic
  • Orthorhombic
  • Tetragonal
  • Trigonal
In a face centred cubic cell, an atom at the face contributes to the unit cell
  • 1 part
  • 1/2 part
  • 1/4 part
  • 1/8 part
The arrangement of the first two layers, one above the other, in hcp and ccp arrangements is
  • Exactly same in both cases
  • Partly same and partly different
  • Different from each other
  • Nothing definite
ccp tallies with
  • bcc
  • fcc
  • hcp
  • none of these
In a closest packed lattice, the number of tetrahedral voids formed will be
  • Equal to the number of spheres in the lattice
  • Half than that of the number of spheres
  • Double than that of the number of spheres
  • None of these
If R is the radius of the sphere in the close packed arrangement and r is the radius of the tetrahedral void, then
  • R = 0.225 r
  • r = 0.225 R
  • r = 0.414 R
  • R =0.414 r
The available space occupied by spheres of equal size in three dimensions in both hcp and ccp arrangement is
  • 74%
  • 70%
  • 60.4%
  • 52.4%
In a face centred cubic lattice, the number of nearest neighbours for a given lattice point is
  • 6
  • 8
  • 12
  • 14
The structure of TICI is similar to CsCl. What would be the radius ratio in TICI ?
  • 0.155 - 0.225
  • 0.225 – 0.414
  • 0.414 – 0.732
  • 0.732 – 1.000
The formula for determination of density of unit cell is:

  • Chemistry-The Solid State-8573.png
  • 2)
    Chemistry-The Solid State-8574.png

  • Chemistry-The Solid State-8575.png

  • Chemistry-The Solid State-8576.png
The ionic radii are in the order
  • Na+ < Mg2+ < Al3+
  • Na+ > Mg2+ > Al3+
  • Al3+ < Mg2+ > Na+
  • Mg2+ < Na+ < Al3+
The correct order of increasing radii of the ions Br‒, F‒, O2‒ and S2‒ is as follows:
  • Br‒,< F‒ < O2‒ < S2‒
  • S2‒< O2‒ < F‒ < Br‒,
  • F‒ < O2‒ < S2‒ < Br‒
  • F‒ < Br‒ < O2‒< S2‒
The tetrahedral voids formed by ccp arrangement of Cl‒ ions in rock salt structure are
  • occupied by Na+ ions
  • occupied by Cl‒ ions
  • occupied by either Na+ or Cl‒ ions
  • vacant
The co-ordination number of Cs+ and Cl- ions in CsCl structure is
  • 4 : 4
  • 6 : 6
  • 8 : 8
  • 4 : 8
The co-ordination number of Zn2+ and S2-ions in the zinc blende (ZnS) type structure is
  • 4 : 4
  • 6 : 6
  • 8 : 8
  • 4 : 8
Which one of the following statements is wrong about zinc blende type structure ?
  • Each Zn2+ ion is surrounded tetrahedrally by four S2- ion and each S2- ion by four Zn2+ ions
  • S2- ions form fcc arrangement
  • AgBr has zinc blende type structure
  • Cuprous halides have zinc blende type structure
The structure drawn below is for
Chemistry-The Solid State-8578.png
  • Fluorite
  • Cesium chloride
  • Wurtzite
  • Zinc blende
Example of a non- stoichiometric compound is :
  • FeS
  • CaF2
  • Fe0.9S
  • ZnS
Bragg’s law is given by equation
  • nλ = 2θ sinθ
  • nλ = 2d sinθ
  • 2nλ = d sinθ
  • nλ = 1/2 dsinθ
Which of the following is an orthosilicate ?
  • Se2 (Si2O7)
  • Mg2SiO4
  • Na2SiO3
  • MgSiO3
Schottky defect in crystals is observed when
  • unequal number of cations and anions are missing from the lattice
  • equal number of cations and anions are missing from the lattice
  • an ion leaves its normal site and occupies an interstitial site
  • density of the crystal is increased
In the Schottky defect
  • cations are missing from the lattice sites and occupy the interstitial sites
  • equal number of cations and anions are missing
  • anions are missing and electrons are present in their place
  • equal number of extra cations and electrons are present in the interstitial sites.
Schottky defect is likely to be found in :
  • Agl
  • NaCl
  • ZnS
  • ZnO
Of the following crystal lattices, the one that has the largest packing fraction is
  • Body centred cubic
  • Simple cubic
  • Simple tetragonal
  • Face centred cubic
For the various types of interactions, the correct order of increasing strength is
  • Covalent < hydrogen bonding < van der Waals < dipole –dipole
  • van der Waals < hydrogen bonding < dipole-dipole < covalent
  • van der Waals < dipole – dipole < hydrogen boding < covalent
  • dipole – dipole < van der Waals < hydrogen bonding < covalent
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