States of Matter MCQs – II

201) Which of the following statements is false regarding liquids?
a) Liquids diffuse more slowly than gases
b) During evaporation of liquids, heating is always caused
c) Vapour pressure of liquids increases with a rise in temperature
d) Viscosity of liquids decreases with a rise in temperature.
202) The characteristic features of solids are their
a) Definite shape
b) Definite size
c) Definite shape and size
d) Definite shape, size and rigidity
203) The constituent particles of a solid have
a) translatory motion only
b) rotatory motion only
c) vibratory motion only
d) all the above types of motion
204) Amorphous substances show (a) Short and long range order (b) Short range order (c) Long range order (d) have no sharp m.p.
a) a and c are correct
b) b and c are correct
c) c and d are correct
d) b and d are correct
205) Which of the following is not a characteristic of crystalline solids?
a) They have a regular geometry
b) They have sharp melting points
c) They are isotropic
d) They undergo a clean cleavage
206) When the molten form of a crystalline solid is rapidly cooled, it changes into a/an
a) crystalline solid
b) amorphous solid
c) insulator
d) superconductor
207) Which among the following will show anisotropy?
a) glass
b) barium chloride crystal
c) water
d) amorphous sulphur
208) Amorphous solids are
a) Solid substances in real sense
b) Liquids in real sense
c) Supercooled liquids
d) Substances with definite M.P.
209) Which of the following is not a crystalline solid?
a) Common salt
b) Sugar
c) Iron
d) Rubber
210) Which of the following is a non-crystalline solid?

a) CsCI
b) NaCI
c)
d) glass
211) Which of the following is an amorphous solid ?


a) NaCI
b) CsCI
c) solidified tar
d)
212) Which of the following is not an amorphous solid?
a) Polythene
b) Quartz
c) Glass
d) Pitch
213) Amorphous solids
a) possess sharp melting points
b) undergo clean cleavage when brocken
c) do not undergo clean cleavage when brocken
d) possess orderly arrangement over long distances
214) Which of the following is a pseudo solid?
a) glass (only)
b) pitch (only)

c) KCI
d) both glass and pitch
215) If heat is supplied to a pure substance which is just beginning to melt, the
a) critical temperature will rise
b) temperature will remain constant
c) temperature will immediately rise
d) temperature will fall
216) Which of the following is an example of a covalent solid?
a) Silicon carbide
b)
c)
d) Iodine
217) ZnS is an example of a/an
a) Ionic crystal
b) Covalent crystal
c) Molecular crystal
d) Metallic crystal
218) LiF is an example of a/an
a) Ionic crystal
b) Metallic crystal
c) Covalent crystal
d) Molecular crystal
219) Graphite is an example of a/an
a) Ionic crystal
b) Covalent crystal
c) Molecular crystal
d) Metallic crystal
220) Solid is an example of a/an
a) Ionic crystal
b) Covalent crystal
c) Metallic crystal
d) Molecular crystal
221) Wax is an example of a
a) Ionic crystal
b) Covalent crystal
c) Molecular crystal
d) Metallic crystal
222) Which of the following is an example of a covalent cryalline solid?
a) Si
b) AI
c) Ar
d) NaF
223) Which is an example of a metallic crystalline solid?
a) Si
b) C
c) P
d) W
224) Silicon dioxide is an example of a
a) Metallic crystal
b) Ionic crystal
c) Covalent crystal
d) None
225) In solids, the constituent particles may be
a) Atoms only
b) Ions only
c) Molecules only
d) Any of the above three
226) Ionic crystals are:
a) Metallic
b) Ionic
c) Molecular
d) Covalent
227) An NaCI crystal is made up of

a) NaCI molecules
b)
c) Na and CI atoms
d) Polymers of NaCI
228) A molecular crystalline solid
a) is very hard
b) is volatile
c) has a high melting point
d) is a good conductor
229) Which of the following are good conductors of electricity when dissolved in polar solvents ?
a) Ionic crystals
b) Molecular crystals
c) Covalent crystals
d) Metallic crystals
230) Ionic solids are characterised by their
a) good conductivity in solid state
b) high vapour pressure
c) low melting point
d) solubility in polar solvents
231) Crystals which are good conductors of electricity and heat are
a) Ionic
b) Covalent
c) Metallic
d) Molecular
232) Among the following which crystal will be soft and have a low melting point?
a) Covalent
b) Ionic
c) Metallic
d) Molecular
233) Which of the following is a molecular crystal?
a) SiC
b) NaCI
c) Graphite
d) Ice
234) An example of a substance possessing a giant covalent structure is
a) Iodine crystal
b) Silica
c) Solid carbon dioxide
d) White phosphorus
235) Which one of the following will have a low heat of fusion?
a) a covalent solid
b) an ionic solid
c) a metallic solid
d) a molecular solid
236) Which of the following are the correct axial distances and axial angles for a rhombohedral system?

a)
b)
c)
d)
237) a/an
a) tetragonal system
b) orthorhombic system
c) monoclinic system
d) triclinic system
238) represents a/an
a) tetragonal system
b) orthorhombic system
c) monoclinic system
d) triclinic system
239) Copper belongs to the
a) cubic system
b) tetragonal system
c) monoclinic system
d) triclinic system
240) The number of atoms present in a unit cell of a monoatomic substance (element) of a simple cubic , body-centered cubic and face-centred cubic lattice respectively are
a) 8,9 and 14
b) 1,2 and 4
c) 4,5 and 6
d) 2,3 and 5
241) Which of the following does not represent a type of crystal?
a) Isomorphous
b) Triclinic
c) Hexagonal
d) Rhombohedral
242) Bravais lattices are of
a) 10 types
b) 8 types
c) 7 types
d) 14 types
243) is an example of a
a) Monoclinic system
b) Rhombic system
c) Tetragonal system
d) Triclinic system
244) The NaCI crystal belongs to the crystal system:
a) tetragonal
b) cubic
c) orthorhombic
d) monoclinic
245) Diamond belongs to the crystal system
a) cubic
b) triclinic
c) tetragonal
d) hexagonal
246) In a simple cubic cell, each point on a corner is shared by
a) 2 unit cells
b) 1 unit cell
c) 8 unit cells
d) 4 unit cells
247) In a simple cubic cell, an atom at the corner contributes to the unit cell
a) 1 part
b) ½ part
c) ¼ part
d) 1/8 part
248) In a face centred cubic cell, an atom at the face centre is shared by
a) 4 units cells
b) 2 unit cells
c) one unit cell
d) 6 unit cells
249) In a face centred cubic cell, an atom at the face contributes to the unit cell
a) 1 part
b) ½ part
c) ¼ part
d) 1/8 part
250) In a body centred cubic cell, an atom at the body centre is shared by
a) 1 unit cell
b) 2 unit cells
c) 3 unit cells
d) 4 unit cells
251) Which of the following type of cubic lattice has the maximum number of atoms per unit cell?
a) Simple cubic
b) Body centred cubic
c) Face centred cubic
d) All have same
252) How many atoms does the edge atom of a cube provide to the unit cell?
a) ½
b) ¼
c) 1/8
d) 1
253) Graphite belongs to the
a) cubic system
b) tetragonal system
c) rhombohedral system
d) hexagonal system
254) The most unsymmetrical crystal system is
a) Cubic
b) Hexagonal
c) Triclinic
d) Orthorhombic
255) When the number of atoms per unit cell is 2, the arrangement is
a) octahedral
b) fcc
c) bcc
d) none of these
256) The three dimensional graph of lattice points which sets the pattern for the whole lattice is called the
a) space lattice
b) simple lattice
c) unit cell
d) crystal lattice
257) Which one of the following is a primitive unit cell?
a) Simple cubic
b) Body-centred cubic
c) Face-centred cubic
d) Both body-centred and face-centred cubic
258) In a body centred cubic unit cell, how many other metal atoms surround a metal atom at the centre of the cell ?
a) 8
b) 6
c) 12
d) 4
259) How many atoms are there in a cube based unit cell having one atom on each corner and two atoms on each body diagonal of the cube?
a) 8
b) 6
c) 4
d) 9
260) The maximum proportion of available volume that can be filled by a hard sphere in diamond is
a) 0.52
b) 0.34
c) 0.32
d) 0.68
261) The coordination number of the hexagonal closed packed (hcp) structure is
a) 12
b) 10
c) 8
d) 6
262) The arrangement of the first two layers, one above the other, in hcp and ccp arrangements is
a) Exactly the same in both cases
b) Partly the same and partly different
c) Different from each other
d) Nothing definite
263) The more efficient mode of packing of identical atoms in one layer is
a) Square close packing pattern
b) Hexagonal close packing pattern
c) Both (a) and (b)
d) None of the two
264) The ABAB….. packing and ABC ABC ….packing are respectively called as
a) hexagonal close packing (hcp) and cubic close packing (ccp)
b) ccp and hcp
c) body centred cubic (bcc) paking and hexagonal close packing (hcp)
d) hcp and bcc
265) The total number of atoms required to form a unit cell of bcc lattice will be
a) 6
b) 8
c) 9
d) 12
266) The total number of identical spheres required in cubic close packing arrangement of a unit cell is
a) 6
b) 8
c) 12
d) 14
267) ccp tallies with
a) bcc
b) fcc
c) hcp
d) none of these
268) A tetrahedral void in a crystal implies that
a) shape of the void is tetrahedral
b) molecules forming the void are tetrahedral in shape
c) the void is surrounded tetrahedrally by four spheres
d) the void is surrounded by six spheres
269) A double triangular void surrounded by three spheres above and three spheres below is called a/an
a) triangular void
b) tetrahedral void
c) octahedral void
d) trigonal bipyramidal void
270) In a close packed lattice, the number of octahedral sites as compared to tetrahedral ones will be
a) Equal
b) Half
c) Double
d) none of these
271) In a close packed lattice, the number of tetrahedral voids formed will be
a) Equal to the number of spheres in the lattice
b) Half that of the number of spheres
c) Double that of the number of spheres
d) None of these
272) The number of octahedral sites in a cubical close packed array of N spheres is
a) N/2
b) 2N
c) N
d) 4N
273) The coordination number of a cation occupying an octahedral hole is
a) 4
b) 6
c) 8
d) 12
274) The size of an octahedral void formed in a close packed lattice as compared to that of a tetrahedral void is
a) Equal
b) Smaller
c) Larger
d) Not definite
275) The number of octahedral voids in a unit cell of a cubic close packed structure is
a) 1
b) 2
c) 4
d) 8
276) If R is the radius of the sphere in the close packed arrangement and r is the radius of the tetrahedral void, then
a) R = 0.225r
b) r = 0.225 R
c) r = 0.414 R
d) R = 0.414 r
277) If R is the radius of the spheres in the close packed arrangement and r is the radius of the octahedral void, then
a) R = 0.414r
b) r = 0.4141R
c) r = 0.225r
d) R = 0.414r
278) The space occupied in the bcc arrangement is
a) 74%
b) 70%
c) 68%
d) 60.4%
279) The vacant space in a bcc unit cell is
a) 32%
b) 10%
c) 23%
d) 46%
280) The available space occupied by spheres of equal size in three dimensions in both the hcp and the ccp arrangement is
a) 74%
b) 70%
c) 60.4%
d) 52.4%
281) The empty space in the hcp and ccp is about
a) 25%
b) 30%
c) 35%
d) 40%
282) The available space filled in hexagonal close packing pattern in one layer is
a) 40%
b) 52.4%
c) 60.4%
d) 70%
283) Which one of the following is not a close packing?
a) hcp
b) ccp
c) bcc
d) fcc
284) Close packing is maximum in the crystal lattice of
a) Simple cubic
b) Face centred
c) Body centred
d) None of the above
285) Which of the following has hcp structure?
a) AI
b) Mg
c) Cu
d) Ni
286) Which of the following crystallizes in ccp structure ?
a) Ag
b) Be
c) Mg
d) Mo
287) Which of the following crystallizes in bcc structure?
a) AI
b) Cu
c) Mg
d) W
288) All noble gases crystallize in the ccp structure except
a) Helium
b) Neon
c) Argon
d) Krypton
289) The co-ordination number of each atom in hcp or ccp is
a) 4
b) 6
c) 8
d) 12
290) The co-ordination number of each atom in bcc is
a) 4
b) 6
c) 8
d) 12
291) The positions of the ions in the NaCI structure are at the
a) Corners of the cube
b) Centres of faces of the cube
c) Corners as well as centres of the faces of the cube
d) Edge centres of the cube
292) The number of NaCI units present in a unit cell of NaCI are
a) 1
b) 2
c) 4
d) 8
293) Which of the following does not have a rock salt type structure?

a) KBr
b) AgI
c)
d) CaO
294) The number of atoms in 100 g of an FCC crystal with density and cell edge 200 pm is equal to
a)
b)
c)
d)
295) The structure of sodium chloride is
a) hexagonal
b) octahedral
c) rhombohedral
d) tetrahedral
296) The unit cell of a NaCI lattice
a) is face centred cubic
b) is body centred cubic
c) is simple cubic
d) is electrically charged
297) The number of ions required to form the ccp lattice of the NaCI structure are
a) 6
b) 12
c) 13
d) 14
298) Each unit cell of NaCI consists of ions and
a)
b)
c)
d) All are wrong
299) The tetrahedral voids formed by the ccp arrangement of ions in rock salt structure are
a)
b)
c)
d) Vacant
300) The structure of MgO is similar to NaCI. The co-ordination number of Mg is
a) 2
b) 6
c) 4
d) 8

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