QUIZ FIITJEE SOLID STATE & LS
Single Correct Choice Type
1 A solid has a structure in which W atoms are located at the corners of a cubic lattice, O atom
at the centre of the edges and Na atom at centre of the cubic. The formula for the compound
is
(A) NaWO2 (B) NaWO3 (C) Na2WO3 (D) NaWO4
2 The density of CaF2 (fluorite structure) is 3.18 g/cm3. The length of the side of the unit cell is
(A) 253 pm (B) 344 pm (C) 546 pm (D) 273 pm
3 Which of the following statements is correct in the rock-salt structure of an ionic compounds?
(A) coordination number of cation is four whereas that of anion is six.
(B) coordination number of cation is six whereas that of anion is four.
(C) coordination number of each cation and anion is four.
(D) coordination number of each cation and anion is six.
4 The coordination number of cation and anion in Fluorite CaF2 and CsCl are respectively
(A) 8:4 and 6:3 (B) 6:3 and 4:4 (C) 8:4 and 8:8 (D) 4:2 and 2:4
5 The tetrahedral voids formed by ccp arrangement of Cl– ions in rock salt structure are
(A) Occupied by Na+ ions (B) Occupied by Cl– ions
(C) Occupied by either Na+ or Cl– ions (D) Vacant
6 If the anions (A) form hexagonal closest packing and cations (C) occupy only 2/3 octahedral
voids in it, then the general formula of the compound is
(A) CA (B) CA2 (C) C2A3 (D) C3A2
7 A solid is formed and it has three types of atoms X, Y, Z. X forms a FCC lattice with Y atoms
occupying all the tetrahedral voids and Z atoms occupying half the octrahedral voids. The
formula of the solid is:
(A) X2Y4Z (B) XY2Z4 (C) X4Y2Z (D) X4YZ2
8 A compound XY crystallizes in BCC lattice with unit cell edge lenght of 480 pm. If the radius
+
of Y– is 225 pm, then the radius of X is
(A) 127.5 pm (B) 190.68 pm (C) 225 pm (D) 255 pm
9 The mass of a unit cell of CsCl corresponds to
(A) 1 Cs+ and 1 Cl– (B) 1 Cs+ and 6 Cl– (C) 4 Cs+ and 4 Cl– (D) 8 Cs+ and 1 Cl–
10 In the closest packing of atoms A (radius : ra), the radius of atom B that can be fitted
into tetrahedral voids is
(A) 0.155 ra (B) 0.225 ra (C) 0.414 ra (D) 0.732 ra
11 NH4Cl crystallizes in a body-centered cubic type lattice with a unit cell edge length of 387
pm. The distance between the oppositively charged ions in the lattice is
(A) 335.1 pm (B) 83.77 pm (C) 274.46 pm (D) 137.23 pm
12 In diamond, carbon atom occupy FCC lattice points as well as alternate tetrahedral voids. If
edge length of the unit cell is 356 pm, then radius of carbon atom is
(A) 77.07 pm (B) 154.14 pm (C) 251.7 pm (D) 89 pm
13 Which of the following will show schottky defect
(A) CaF2 (B) ZnS (C) AgCl (D) CsCl
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14 Give the correct order of initials T (true) or F (false) for following statements.
I. In an anti-fluorite structure anions form FCC lattice and cations occupy all tetrahedral
voids.
II. If the radius of cations and anions are 0.2 Å and 0.95 Å then coordinate number of
cation in the crystal is 4.
III An atom/ion is transferred from a lattice site to an interstitial position in Frenkel
defect.
IV. Density of crystal always increases due to substitutinal impurity defect.
(A) TFFF (B) FTTF (C) TFFT (D) TFTF
15. If a b c, 900 , 900 , the crystal system is
(A) Cubic (B) Orthorhombic
(C) Monoclinic (D) Hexagonal
16. A solid crystal is composed of X, Y and Z atoms. Y atoms are occupying 50% of octahedral
voids, where as X atoms are occupying the 100% tetrahedral void with Z atoms in ccp array
arrangement, then the rational formula of the compound in the given crystal is
(A) X 8 Y2 Z 4 (B) X 5 Y10 Z8
(C) X 4 YZ2 (D) X16 Y4 Z8
17. Edge length of a cube is 400 pm its body diagonal would be
(A) 600 pm (B) 566 pm
(C) 693 pm (D) 500 pm
18. A crystal is made up of particles X, Y and Z. X forms fcc packing. Y occupied all the
octahedral voids of X and Z occupies all the tetrahedral voids of X. If all the particles along
one body diagonal are removed then the formula of the crystal would be
(A) XYZ2 (B) X2YZ2
(C) X8Y4Z5 (D) X5Y4Z8
19 When NaCl is heated in presence of sodium vapour, it becomes yellow coloured due to
(A) Schottky defect (B) Frenkel defect
(C) Metal excess defect (D) Metal deficiency defect
20. In stoichiometric defects, the ratio of positive and negative ions as indicated by chemical
formula of the compound
(A) decreases (B) increases
(C) remains same (D) can increase or decrease
21. An azeotropic solution of two liquids has boiling point lower than either of them when it
(A) shows negative deviation from Raoult’s law
(B) show no deviation from Raoult’s law
(C) shows positive deviation from Raoult’s law
(D) is saturated
22. For a dilute solution, Raoult’s law states that
(A) the lowering of vapour pressure is equal to the mole fraction of solute
(B) the relative lowering of vapour pressure is equal to the mole fraction of solute
(C) the relative lowering of vapour pressure is proportional to the amount of solute in
solution
(D) the vapour pressure of the solution is equal to the mole fraction of solvent
23. A molal solution is one that contains one mole of a solute in
(A) 1000 g of the solvent (B) 1 L of the solvent
(C) 1 L of the solution (D) 22.4 L of the solution
24. When mercuric iodide is added to the aqueous solution of potassium iodide
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(A) freezing point is raised (B) freezing point is lowered
(C) freezing point does not change (D) boiling point does not change
25. Which of the following 0.1 M aqueous solution will have the lowest freezing point?
(A) Potassium sulphate (B) Sodium chloride
(C) Urea (D) Glcuose
26. The freezing point of equimolal aqueous solutions will be highest for
(A) C6H5NH3Cl (aniline hydrochloride) (B)Ca(NO3)2
(C) La(NO3)3 (D)C6H12O6 (glucose)
27. The molecular weight of benzoic acid in benzene as determined by depression in freezing
point method corresponds to
(A) ionization of benzoic acid
(B) dimerization of benzoic acid
(C) trimerization of benzoic acid
(D) salvation of benzoic acid
28. During depression of freezing point in a solution the following are in equilibrium
(A) Liquid solvent, solid solvent
(B) Liquid solvent, solid solute
(C) Liquid solute, solid solute
(D) Liquid solute, solid solvent
29. 0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of Na2SO4 is
(A) 75% (B) 50%
(C) 25% (D) 85%
30. The elevation in boiling point, when 13.44 g of freshly prepared CuCl2 are added to one
kilogram of water, is. [Some useful data, kb = 0.52 kg K mol–1, molecular weight of CuCl2 =
134.4 g]
(A) 0.05 (B) 0.1
(C) 0.16 (D) 0.21
31. When 20 g of naphthoic acid (C11H8O2) is dissolved in 50 g of benzene (kf = 1.72 K kg mol–1),
a freezing point depression of 2 K is observed. The van’t Hoff factor (i) is
(A) 0.5 (B) 1
(C) 2 (D) 3
32. The Henry’s law constant for the solubility of N2 gas in water at 298 K is 1.0 × 105 atm. The
mole fraction of N2 in air is 0.8. The number of moles of N2 from air dissolved in 10 moles of
water of 298 K and 5 atm pressure is
(A) 4.0 × 10–4 (B) 4.0 × 10–5
–4
(C) 5.0 × 10 (D) 4.0 × 10–6
33. The freezing point (in°C) of solution containing 0.1 g of K3[Fe(CN)6] (mol. wt. 329) in 100 g of
water (Kf = 1.86 K kg mol–1) is
(A) –2.3 × 10–2 (B) –5.7 × 10–2
–3
(C) –5.7 × 10 (D) –1.2 × 10–2
Multiple Correct Choice Type
34. If ‘a’ is the edge length of a unit cell, then correct option(s) is/are
a
(A) for simple cubic lattice, radius of metal atom =
2
3a
(B) for b.c.c lattice radius of metal atom =
2
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a
(C) for f.c.c lattice radius of metal atom =
2 2
(D) option B & C are incorrect
35. In fcc structure octahedral sites are present at
(A) edge centres (B) face centres
(C) body centres (D) corners
36. Which of the following is/are the characteristic(s) of the unit cell of ZnS (Zinc blend)?
(A) S2– ions are present at corners and face-centres of the fcc unit cell
(B) Zn2+ ions occupy half of the available tetrahedral holes
(C) The coordination number of Zn2+ and that of S2– is 6 each
r
(D) The radius ratio is 0.732
r
37. Which is/are correct statement about zinc blende structure?
(A) The number of first neighbours of S2– is 4
a 3
(B) The maximum distance between Zn2+ is , where ‘a’ = edge length of unit cell
2
(C) If all tetrahedral voids occupied by Zn2+ then C.N. of S2– is 8.
(D) If all tetrahedral voids occupied by Zn2+ then C.N. change from 4 : 4 to 8 : 8
38. The correct statement(s) regarding defects in solid is(are)
(A) Frenkel defect is usually favoured by a very small difference in the sizes of cation and
anion
(B) Frenkel defects in a dislocation defect
(C) trapping of an electron is the lattice leads to the formation of F – centre
(D) Schottky defects have no effect ton the physical properties of solids
39. Which is incorrect for Frenkel defect
(A) density of the crystal decreases (B) conduction increases
(C) conduction decreases (D) crystal becomes charged electrically
40. When a non volatile solute is added to a pure solvent, the
(A) vapour pressure of the solution becomes lower than that of the pure solvent
(B) rate of evaporation of the pure solvent is reduced
(C) solute does not affect the rate of condensation
(D) rate of evaporation of the solution is equal to the rate of condensation of the solution at a
lower vapour pressure than that in the case of the pure solvent
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