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CBSE Questions for Class 12 Engineering Chemistry The Solid State Quiz 3 - MCQExams.com

Which of the following parameters are correct for triclinic lattice?
  • α=β=γ=9 and a=b=c
  • αβγ90 and abc
  • α=γ=90,β90 and abc
  • α=β=γ=90 and abc
A solid ABC has A, B and C arranged as below. The formula of solid is:
1531204_5dba7e734f0843bd904937281d90d83b.JPG
  • ABC
  • AB2C2
  • A2BC
  • AB8C2
Select the correct statement (s) :
  • The ionic crystal of AgBr may have Schottky defect.
  • The unit cell having crystal parameters, a=bc,α=β=90,γ=120 is hexagonal.
  • In ionic compounds having Frankel defect the ratio r+/r is high.
  • The co-ordination of Na+ ion in NaCl is 6.
Copper atoms are living on 8 corners and silver atoms on 6 faces while gold at body centre. Find the formula 
  • CuAg3Au
  • Cu3Au3Ag
  • CuAgAu
  • Cu2AuAg
Edge length is 200pm in body-centred unit cell what will be the radius of atom in pm?
  • 139
  • 150
  • 86.6
  • 93.4
The limiting radius ratio of the complex [Ni(CN)4]2 is
  • 0.225-0.414
  • 0.414-0.732
  • 0.155-0.225
  • None of these
A metal crystallizes in a face-centered cubic structure. If the edge length of its unit cell is 'a' the closest approach between two atoms in a metallic crystal will be:
  • 2a
  • a2
  • 2a
  • 22a
Which of the following is the only incorrect statement regarding amorphous solids?
  • On heating, they may become crystalline at some temperature
  • They may become crystalline on keeping for long time
  • Amorphous solids can be molded by heating
  • They are anisotropic in nature
CCP is also called as : 
  • FCC
  • BCC
  • Primitive
  • HCP
Which of the following characteristic features match(es) with the crystal systems: hexagonal and monoclinic?
  • Both have the cell parameters; a=b=c and α=β=γ
  • Both belong to different crystal systems
  • Both have only two crystallographic angles of 90o
  • Both belong to same crystal system
In AgBr crystal, the ion size lies in the order Ag+<<Br. The AgBr crystal should have:
  • Defectless (perfect) crystal
  • Schottky defect only
  • Frenkel defect only
  • Both Schottky and Frenkel defects
In a closed packed structure, if r is the radius of the spherical void and R is the radius of the spheres forming voids, the critical r/R value of the tetrahedral void is equal to
  • 0.155
  • 0.255
  • 0.414
  • 0.732
The crystal lattice of ice is mostly formed by : 
  • ionic forces
  • covalent bonds
  • intramolecular H-bonds
  • covalent as well as H-bonds
The body centered cubic cell of chromium has a length of 0.288nm. Calculate the density of chromium (g/cm3) : (Atomic weight : Cr=52.0)
  • 6.80
  • 7.60
  • 6.60
  • 7.23
The fraction of volume occupied by atoms in a body centered cubic unit cell is:
  • 0.32
  • 0.48
  • 0.68
  • 0.74
Choose the correct statement about the given figures.
1843661_1d1a5ee5757940179fbb04c458c43edb.png
  • (II) represents solid state while (III) represent liquid state.
  • (II) represents solid state while (III) represent solid state.
  • (I) represents solid state while (III) represent liquid state.
  • (I) represents solid state while (III) represent solid state.
Complete the given table:

1845162_efeb66b7dd434c1ab982bd62eff5cb47.png
  • A - Impurity Defect ; B - Stoichiometric Defect ; C - Non-Stoichiometric Defect ; D - Anion Excess Defect
  • A - Stoichiometric Defect ; B - Non-Stoichiometric Defect ; C - Impurity Defect ; D - Metal Excess Defect
  • A - Non-Stoichiometric Defect ; B - Stoichiometric Defect ; C - Impurity Defect ; D - Cation Defect
  • A - Impurity Defect ; B - Stoichiometric Defect ; C - Metal Excess Defect ; D - Non-Stoichiometric Defect
Which is the effect represented by the given figure?
1845088_e266d7cb64da4c6baa9348d23d46c899.png
  • Schottky defect
  • Frenkel defect
  • Vacancy defect
  • Interstitial defect
The fraction of volume occupied by atoms in a face centered cubic unit cell is :
  • 0.32
  • 0.48
  • 0.68
  • 0.74
Which of the following crystal lattice has the minimum empty space ?
  • Simple cubic
  • Body centered cubic
  • Face centered cubic
  • Simple tetragonal
The crystal system of a compound with unit cell parameters,
a=0.328nm,b=0.328nm,c=0.527nm and α=β=γ=90 is :
  • Cubic
  • Tetragonal
  • Monoclinic
  • Rhombohedral
Dopping of AgCl crystals with CdCl2 results in:
  • Schottky defect
  • Frenkel defect
  • Substitutional cation vacancy
  • Formation of F-centres
Structure shown here represents :
1859398_79383692cd2544b38ea934b2d6ebebbb.png
  • Schottky defect
  • Frenkel defect
  • Both defects
  • None of these
The radius of a divalent cation A2+ is 94pm and that of a divalent anion B2 is 146pm. The compound AB has a/an :
  • Rock salt structure
  • Zinc blende structure
  • Antifluorite structure
  • Caesium chloride like structure
An element crystallizes in a structure having fcc unit cell of an edge 200pm. Calculate the density, if 100g of this element contains 12×1023 atoms:
  • 41.66g/cm3
  • 4.166g/cm3
  • 10.25g/cm3
  • 1.025g/cm3
one or more answers is / are correct.
Select the correct statement(s):
  • The co-ordination number of each type of ion in a CsCl crystal is twelve
  • A metal that crystallizes in a bcc structure has a co-ordination number of twelve
  • A unit cell of an ionic crystal shares some of its ions with other unit cells
  • The length of the unit cell in NaCl in 552 pm (given that rNa+=85pm and rCl=181pm)
If the same type of atoms are packed in hexagonal closest packing (hcp) and cubical closest packing(ccp) separately, then: 
  • Density of hcp will be greater than ccp
  • Density of hcp will be smaller than ccp
  • Density of hcp will be equal to ccp
  • Density of hcp may be equal or greater than ccp depending upon the temperature of the system.
Which one is an amorphous solid?
  • Diamond
  • Graphite
  • Common salt
  • Glass
ZnS crystallises in a cubic structure in which Zn2+ions occupy half of tetrahedral voids while S2 ions occupy all corners and face centres. Hence the number of ZnS molecules present in 4 unit cells are 
  • 12
  • 16
  • 18
  • 24
A metallic element exists as cubic lattice. Each edge of the unit cell is 2.88˚A. The density of the metal is 7.20\ g cm^{-3}. How many unit cell will be present in 100 g of the metal?
  • 6.85 \times 10^2
  • 5.82 \times 10^{23}
  • 4.37 \times 10^5
  • 2.12 \times 10^6
KF has NaCl structure. The edge length of its unit cell has been found to be 537.6\ pm. The distance between K^{+} and F^{-} in KF is :
  • 537.6 \ pm
  • 268.8\ pm
  • 107.5\ pm
  • Cannot\ be\ calculated
Which of the following solids have tetragonal crystal system
  • NaCl
  • ZnS
  • TiO_{2}
  • ZnO
In orthorhombic, the value of a, b and c are respectively 4.2\ A, 8.6\ A and 8.3\ A.Given the molecular mass of the solute is 155\ gm\ mol^ {-1} and that of density is 3.3\ gm\ cc the number of formula units per unit cell is
  • 2
  • 3
  • 4
  • 6
Which of fallowing has different structure than other?
  • NaCl
  • LiCl
  • RbCl
  • CsCl
How many types of crystalline solids are found?
  • 2
  • 6
  • 4
  • none of these
Which of the following is correct?
  • Crystal system \rightarrow Cubic;
    Axial distance \rightarrow a=b=c;
    Axial angles \rightarrow \alpha = \beta = y = 90^o ;
    Examples \rightarrow Cu,KCl
  • Crystal system \rightarrow Monoclinic \rightarrow ; Axial distance \rightarrow a=b=c ;
    Axial angles \rightarrow \alpha = \beta = y = 90^o ;
    Examples \rightarrow PbCrO_2, PbCrO_4
  • Crystal system \rightarrow Rhomboherdal; Axial distance \rightarrow a = b = c;
    Axial angles \rightarrow \alpha = \beta = y = 90^o ;
    Example \rightarrow CaCO_3
  • Crystal system \rightarrow Triclinic; Axial distance \rightarrow a = b = c;
    Axial angles \rightarrow \alpha = \beta = y = 90^o ;
    Examples \rightarrow K_2Cr_2O_7, CuSO_4.5H_2O
The unit cell has an edge length 403 pm.The distance between two atoms placed opposite ends of body diagonal will be :
  • 8.6 pm
  • 201.5 pm
  • 698 pm
  • 578 pm
Edge length of a cubic unit cell is 354 pm,The distance between two atoms diagonally opposite on the face is
  • 500 pm
  • 354 pm
  • 700 pm
  • 627 pm
Edge length of a cube is 400 pm, its body diagonal would be
  • 500 pm
  • 600 pm
  • 566 pm
  • 693 pm
Which of the following has highest lattice energy?
  • NaCl
  • MgCl_2
  • KCl
  • BaCl_2
How many unit cells of KBr are present in a 1.00{ mm }^{ 3 }  grain of KBr,KBr crystallizes in NaCl type of crystal lattice and its density is 2.75g/{ cm }^{ 3 }?
  • 3.6\times \quad { 10 }^{ 18 }
  • 3.6\times \quad { 10 }^{ 19 }
  • 4.2\times \quad { 10 }^{ 18 }
  • 4.2\times \quad { 10 }^{ 19 }
The formula of ZnO crystal after heating is ________.
  • Zn_{1-x}O
  • Zn_{1+x}O
  • ZnO
  • All of the above
If the radius of metal atom is 1.00 angstrom and  its crystal structure is simple cubic, then what is the volume of one unit cell?
  • 8\times 10^{-24}m^3
  • 4\times 10^{-30}cm^3
  • 8\times 10^{-30}m^3
  • 2\times 10^{-23}cm^3
The number of lattice points at the centre of the primitive unit cell is
  • 1
  • 2
  • 3
  • 0
A metallic element crystallises in face centred cubic structure. If the radius of metal ion is 0.92 \mathring (A) the edge length of the unit cell of the crystal is
  • 0.8464 \mathring {A}
  • 1.252 \mathring {A}
  • 5.187 \mathring {A}
  • 2.6 \mathring {A}
All of the following  share the same crystal structure except :
  • LiCl
  • NaCl
  • RbCl
  • CsCl
The atomic radius of strontium (Sr) is 215\ pm and it crystalllises in cubic closed packed structure. The edge length of cube is :-
  • 430\ pm
  • 608.2\ pm
  • 496.5\ pm
  • None\ of\ these
The number of Na^{+}ions filling all octahedral voids in NaCl structure are 
  • 6
  • 12
  • 13
  • 14
Which of the following is the component of CsI_3 lattice?
  • Cs^+, I^- & I_2 molecule
  • Covalent bond
  • Cs^+ & I_3^- ions
  • Cs^+ & I_2
What is a Unit cell?
  •  \text{a compound}
  •  \text{a molecules with some charge}
  •  \text{smallest group of atoms}
  •  \text{none of the above}
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