Q.1.
The number of octahedral void(s) per atom present in a cubic close-packed structure is
-
33%
a) 1
-
17%
b) 2
-
17%
c) 3
-
33%
d) 4
Q.2.
Assertion: The compressibility factor hydrogen varies with pressure with positive slope at all pressures Reason: Even at low pressures, the repulsive forces dominate in hydrogen gas
-
20%
a) If both the assertion and reason are true and reason explains the assertion.
-
60%
b)If both the assertion and reason are true but reason does not explain the assertion
-
20%
c) If assertion is true but reason is false
-
0%
d) If assertion is false but reason is true.
Q.3.
The interionic distance for cesium chloride crystal will be ... [ PMPMT 2007]
-
0%
a) 2 (a/√3)
-
0%
b) a
-
33%
c) a/2
-
67%
d) a(√3/2)
Q.4.
Close packing is maximum in the crystal lattice of ...
-
40%
a) face-centred cubic
-
20%
b) body-centred cubic
-
40%
c) simple cubic
-
0%
d) none of these
Q.5.
Spinel structure is shown by ...
-
0%
a) MgAl2O4
-
0%
b) ZnAl2O4
-
80%
c) MgFe2O4
-
20%
d) all of these
Q.6.
A solid has a structure in which 'W' atoms are located at the corners of a cubic lattice, 'O' atoms at the edges of the cube and sodium atom at the centre of the cube. The formula of compound is
-
0%
a) NaWO2
-
60%
b) Na2WO3
-
40%
c) NaWO3
-
0%
d) NaWO4
Q.7.
Sodium metal exists in bcc unit cell. The distance between nearest sodium atoms is 0.368nm. The edge length of the unit cell is ..
-
40%
a) 0.415 nm
-
20%
b) 0.384 nm
-
0%
c) 0.68 nm
-
40%
d) 0.425 nm
Explanation
Q.8.
What is the name of the phenomenon wherein mechanical stress causes the production of electricity?
-
0%
a) Pyroelectric effect
-
80%
b) Piezoelectricity effect
-
20%
c) Phoroelectric effect
-
0%
d) Ferroelectric effect
Q.9.
A solid X+ Y- has bcc structure. If the distance of closest approach between the two ions is 173 pm, the edge length of the cell is
-
40%
a) 200 pm
-
20%
b) 142.2 pm
-
20%
c) (√3/2)pm
-
20%
d) √2 pm
Explanation
Q.10.
The number of atoms per unit cell in a simple cubic, face-centred cubic and body-centred cubic are ...
-
60%
a) 1, 4, 2
-
0%
b) 4, 1, 2
-
20%
c) 2, 4, 1
-
20%
d) 4, 8, 2
Q.11.
Assertion: Frenkel defect is found in silver halides Reason: Size of Ag+ ion is smaller than halide ion
-
50%
a) If both the assertion and reason are true and reason explains the assertion.
-
50%
b)If both the assertion and reason are true but reason does not explain the assertion
-
0%
c) If assertion is true but reason is false
-
0%
d) If assertion is false but reason is true.
Q.12.
In a solid lattice, the cation has left a lattice site and is located at an interstitial position. The lattice defect is ...[ BHU 2008]
-
0%
a) interstitial defect
-
20%
b) vacancy defect
-
80%
c) Frenkel defect
-
0%
d) Schottky defect
Q.13.
In a face-centred cubic unit cell, edge length is ...[ DPMT 2005]
-
40%
a)
-
20%
b)
-
20%
c) 2r
-
20%
d)
Q.14.
The second order Bragg diffraction of X-rays with λ=1.0Å from a set of parallel planes in a metal occurs at an angle 60°. The distance between the scattering planes in the crystal is .... [ CBSE 1998]
-
40%
a) 1.155 Å
-
0%
b) 1.00 Å
-
60%
c) 2.00 Å
-
0%
d) 1.7 Å
Q.15.
Which of following is not a molecular solid?
-
0%
a) Glucose
-
0%
b) Silicon
-
60%
c) Dry ice
-
40%
d) Naphthalene
Q.16.
An alloy of copper, silver and gold is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centres and gold is present at body-centre, the alloy has the formula
-
0%
a) Cu4Ag2Au
-
50%
b) Cu4Ag4Au
-
17%
c) CuAgAu
-
33%
d) Cu4Ag3Au
Q.17.
Which one of the following is a non-conductor in solid state but becomes a good conductor on melting?
-
40%
a) Diamond
-
20%
b) Ice
-
0%
c) Sodium
-
40%
d) Potassium chloride
Q.18.
Which of the following is not an example of 13-15 compound?
-
0%
a) InSb
-
40%
b) CdSe
-
20%
c) GaAs
-
40%
d) AlP
Q.19.
Assertion: No compound has both Schottky and Frenkel defects Reason: Both defects change the density of the solid
-
25%
a) If both the assertion and reason are true and reason explains the assertion.
-
25%
b)If both the assertion and reason are true but reason does not explain the assertion
-
25%
c) If assertion is true but reason is false
-
25%
d) If assertion and reason both are false
Q.20.
If AB has NaCl structure, 'A' atoms occupy the corners of unit cell. If all the face-centred atoms along one of the axes are removed, then the resultant stoichiometry will be
-
20%
a) A3B4
-
40%
b) AB2
-
0%
c) A2B
-
40%
d) A4B3
Q.21.
Chromium metal crystallises in body-centred cubic lattice. The length of unit cell is found to be 287pm. Atomic radius of chromium will be
-
20%
a) 62.135 pm
-
20%
b) 87.21 pm
-
60%
c) 124.27 pm
-
0%
d) 112.12 pm
Explanation
Q.22.
The distance between Na+ and Cl- ion in NaCl is 281pmWhat is the edge length of the cube?
-
0%
a) 1405pm
-
60%
b) 562pm
-
40%
c) 843pm
-
0%
d) 281pm
Q.23.
Assertion: Meniscus of a liquid disappears at the critical temperature Reason: Density of liquid and its gaseous phase become equal at the critical temperature ...[ BHU 2008]
-
40%
a) If both the assertion and reason are true and reason explains the assertion.
-
60%
b)If both the assertion and reason are true but reason does not explain the assertion
-
0%
c) If assertion is true but reason is false
-
0%
d) If assertion is false but reason is true.
Q.24.
The edge length of face-centred unit cubic cell is 508 pm. If the radius of the cation is 110 pm, the radius of the anion is ...[ CBSE 1998]
-
40%
a) 144 pm
-
0%
b) 288 pm
-
40%
c) 398 pm
-
20%
d) 618 pm
Q.25.
The intermetallic compound Liag crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is ...[ CBSE 1997]
-
0%
a) simple cube
-
60%
b) body-centred cube
-
20%
c) face-centred cube
-
20%
d) none of these
Q.26.
The coordination number of a metal crystallizing in a hexagonal close packed (hcp) structure is ...[ MPPMT 2004]
-
20%
a) 6
-
80%
b) 12
-
0%
c) 4
-
0%
d) 8
Q.27.
The edge length of face-centred cubic cell of an ionic substance is 508pm. If the radius of cation is 110pm, the radius of anion is ...
-
60%
a) 144 pm
-
20%
b) 288 pm
-
20%
c) 398 pm
-
0%
d) 618 pm
Q.28.
in a crystalline solid, anion A are arranged in ccp lattice and cation occupy 50% of octahedral void and 50% of the tetrahedral voids. What is the formula of the solid
-
20%
a) AB
-
20%
b) A3B2
-
40%
c) A2B2
-
20%
d) A2B3
Q.29.
In CsCl, the distance of closet approach between cation an anion will be ...
-
0%
a)
-
0%
b)
-
40%
c)
-
60%
d)
Q.30.
The Ca2+ and F- are located CaF2 crystal respectively at face-centred cubic lattice points and in ...[ AIIMS 2006]
-
60%
a) tetrahedral voids
-
0%
b) half of tetrahedral voids
-
40%
c) octahedral voids
-
0%
d) half of octahedral voids