Solid State1.ABABA......... represents an arrangement of layers called-(a) hcp(b) ccp(c) bcc(d) fcc2.The no of molecules per unit cell which crystallizes in the form of end face centred lattice with a molecule at each lattice site(a) 1(b) 2(c) 4(d) 63.In diamond the coordination no. of carbon is-(a) 4 and its unit cell has 8 carbon atoms.(b) 4 and its unit cell has 6 carbon atoms(c) 6 with 4 carbon atoms in unit cell(d) 4 with 4 carbon atoms in unit cell4. Which of the following crystals does not have 8 : 8 coordination.(a) NH4Cl (b) AlFe (c) MnO (d) NH4Br5. Bond length and bond angles in molecules in the solid state are calculated by X-ray diffraction technique because X-rays are scattered by -(a) Nucleus (b) Protons only(c) Neutrons only (d) Electrons only6. Mark the incorrect statement:(a) In hcp and ccp the sphere is in contact with 6 spheres of its own layer.(b) In both hcp and ccp the sphere has 3 spheres above it and 3 below it.(c) In both hcp and ccp the coordination no. is 12.(d) In inverse spinel (e.g. magnetite, Fe3O4) only dispositive ions occupy octahedral voids while tri-positive ions occupy tetrahedral voids.7. A compound formed by elements A and B crystallises in cubic structure, in which atoms of A are at the corners while that of B are at the face centre. The formula of the compound is -(a) AB3(b) AB(c) A3B(d) None of these8. Na atom crystallizes in bcc lattice with cell edge (a) = 4.29A The radius of Na atom is -(a) 18.6A (b) 1.86A(c) 1.86 pm (d) 1.860 pm9.Pick out the incorrect statement -(a) NaCl structure transform to CsCl structure on heating(b) In CaF2structure each F- ion is coordinated by 4 Ca++ions and each Ca++ion is coordinated by 8F- ions.(c) NaCl has 6:6, CsCl is with 8:8 coordination(d) In Na2O each oxide ion is coordinated by 8 Na+ions and each Na+ion by 40 oxide ions10. NaCl is doped with 2 10-3 mole % of SrCl2. The concentration of cation vacancies is -(a) 6.02 108 /mol(b) 12.04 1018/ mol(c) 3.01 1018/ mol(d) 12.04 1020 / mol11.CaO and NaCl have the same crystal structure and nearly the same ionic radii. If x is the lattice energy of NaCl, the lattice energy of CaO is very nearly :(a) 2 x(b) x(c) 4x (d) x / 212. Which of the following expression is correct for a CsCl unit cell with lattice parameter a.

(a) = 2a(b) = (c) = (d) = 13. Which crystal will have 6:6 coordination?(a) NH4l (b) MnO(c) ZnS (d) None14.Match list I with list II and select the correct answer by using the codes given below:List I (Shape)List II (Radius ratio)(A) Planer triangle(1) 0.732(B) Square Planer(2) 0.225(C) Body Centred cubic(3) 0.115(D) Tetrahedral(4) 0.414(a) 3 4 1 2(b) 3 2 1 4(c) 2 1 4 3(d) 1 3 4 215.Calculate the ionic radius of a Cs+ in nm if the edge length for CsCl is 0.4123 nm and the ionic radius of a Clion is 0.181 nm.(a) 0.176 (b) 0.231 (c) 0.358 (d) 0.11616. Because of anisotropy -(a) Mica cleaves into long, rod like peices and asbestos cleaves into thin sheets.(b) Both cleaves into thin sheets.(c) Mica cleaves into thin sheets and asbestos cleaves into long rod like peices(d) Both cleaves into long rod like peices.17. Which of the crystals has 4:4 coordination ?(a) HgS(b) NH4F(c) NaCl(d) None18.The hcp and ccp structure for a given element would be expected to have same (a) alignment of layers.(b) density(c) packing fraction(d) All the above19. Which of the following statements is correct -(a) C N of each ion in a CsCl crystal is 9.(b) A metal that crystallizes in a bcc structure has a C N of 12.(c) A unit cell an ionic crystal shares some of its ions with other unit cells.(d) The length of unit cell in NaCl is 552 pm with rNa = 95 pm and rCl= 181 pm20.Iron crystalizes in a bcc system with a lattice parameter of 2.861 A. Find the density of Fe in it (at wt. of Fe = 56, NA= 6.02 1023 per mole)(a) 7.92 g/ml(b) 8.96 gm/ml(c) 2.78 gm/ml(d) 6.72 gm/ml21. Which of the following is incorrect?(a) A substitutional solid solution is one in which atoms of the solute metal occupy some locations that solvent metal atoms are expected to occupy(b) An interstitial solid solution is one in which the solute atoms occupy the interstices between the solvent atoms.(c) An intermediate compound is a compound formed between metals and metalloids.(d) Cu3Zn is an intermetallic compound.22. MZX have ANTIFLUORITE structure. In such a structure-(a) Smaller cations occupy the position of fluoride ion and larger anions that of Ca++ions.(b) Larger cations occupy the position of F-ions and smaller anions that of ca++ions.(c) Each F- is surrounded by 4 Ca++in a tetrahedral arrangement (d) F- ions occupy all the 8 octahedral voids.23.The incorrect statements for sphalerite, a form of ZnS is-(a) It structure is similar to diamond except that alternate atoms are Zn and S.(b) Because the S- is larger than the Zn ion only 6 rather than 4 or 8 sulfide ions can be packed around anion.(c) As s- is larger than Zn++only 4 rather than 6 or 8 s- can be packed around Zn++(d) ZnS is a polar covalent compound.24. The fluorite structure shows 8:4 coordination, which lattice has fluorite like structure -(a) SrCl2(b) BaF2(c) ThO2(d) All the above25.In an NaCl structure all the -(a) Octahedral voids are unoccupied(b) Tetrahedral voids are unoccupied(c) Both voids occupied(d) Both voids unoccupied.26. Which has layered lattices-(a) Diamond(b) Ice(c) CdI2(d) All27.T1O2(rutile) shows 6:3 coordination. The solid having rutile like structure among the following is -(a) ZnS(b) KCl(c) SnO2(d) None of the above28. Statement correct for rock salt structure is -(a) The tetrahedral voids are larger than octahedral voids(b) The tetrahedral voids are unoccupied while octahedral voids are occupied by cations.(c) The radius ratio is 0.732(d) The radius ratio is 0.99929.How many octahedral voids are there per sphere in a ccp structure.(a) 4(b) 2(c) 1(d) 630.Which crystals shows 4:2 coordination?(a) CaF2(b) SiO2(c) PbO2(d) None of the above31.The coordination no. of fcc structure for metals is 12, since-(a) each atom touches 4 others in same layer, three in layer above and 3 in layer below.(b) each atom touches 4 others in same layer, 4 in layer above and 4 in layer below-(c) Each atom touches 6 others in same layer, 6 in layer above and 6 in layer below.(d) Each atom touches 3 atoms in the same layer, 6 in layer above and 6 in layer below.32.Amorphous solids may be classified as -(a) Isotropic and super cooled liquids(b) Anisotropic and super cooled liquids(c) Isoenthalpic and superheated liquids(d) Isotropic and superheated solids33.Correct statement for ccp is -(a) each oct. void is surrounded by 6 spheres & each sphere is surrounded by 30 octahedral voids.(b) each oct. void is surrounded by 6 sphere & each sphere is surrounds by 6 octahedral voids.(c) each oct. void is surrounded by 6 spheres and each sphere is surrounded by 8 octahedral void(d) each oct. void is surrounded by 6 sphere and each sphere is surrounded by 12 octahedral voids.34.If hcp and ccp structures are made up of spheres of equal size, the volume occupied per sphere is (given r=radius of sphere)(a) 1.33 r3(b) 5.66 r3 (c) 2.66 r3 (d) 7.40 r335.F - centres are -(a) The electrons trapped in anionic vacancies(b) The electrons trapped in cation vaccancies(c) Non equivalent sites of stoichiometric cpds(d) All of the above.36.Mark the incorrect relation -(a) No. of octahedral voids (In hcp, ccp) = No. of atoms present in closed packed arrangement(b) No. of tetrahedral voids = 2 x no. of octahedral voids(c) ABAB ..... is cubic close packing and ABC ABC .... hexagonal close packing(d) Radius of octahedral void r = 0.414 R37.It was found that parazoxyanide melts at 389 K to give a turbid non uniform liquid but at 408 K, it melts to form clear uniform isotropic liquid. What type of crystal is being described.(a) Molecular crystal(b) covalent crystal(c) Liquid crystal(d) H-bonded crystal38.Li metal has a bcc structure. Its density is 0.53g per cm3and its at. mass is 6.94 gm per mol calculate the edge length of a unit cell of Li metal(a) 153.6 pm(b) 351.6 pm(c) 527.4 pm(d) 263.7 pm39.A metal crystallizes in 2 cubic phases i.e., fcc and bcc whose unit cell lengths are 3.5A and 3.0A respectively. The ratio of their densities is -(a) 3.12(b) 2.04(c) 1.46(d) 0.7240.In the x-ray diffraction of a set of crystal planes having d equal to 0.18 nm a first order reflection is found to be at an angle of 22. The wave length of x-ray is - (given sin 22 = 0.208(a) 0.0749 nm(b) 0.0374 nm(c) 0.749 nm(d) None of these41.For a given crystal the lattice parameter a is 318 pm. The d-spacing for a (III) plane is -(a) 225 pm(b) 184 pm(c) 318 pm(d) 390 pm42.Which of the following statements are correct in context of point defects in a crystal?(a) AgCl has anion Frenkel defect and CaF2has Schottky defects.(b) AgCl has cation frenkel defects and CaF2has anion frenkel defect.(c) Both have anion frenkel defects(d) Both have schottky defects.43.LiBH4is orthorhombic crystal with 4 molecules per unit cell. The unit cell dimensions are a = 6.8 A b=4.4 A and c = 7.2 A. If the molar mass is 21.76 the density is -(a) 0.6708 gm/cm3(b) 1.6708 gm/cm3(c) 2.6708 gm/cm3 (d) All of the above44.NaCl shows Schottky defects & AgCl Frenkel defects. Their electrical conductivity is due to -(a) Motion of ions and not the motion of electrons(b) Motion of electrons and not the motion of ions(c) Lower C N of NaCl(d) Higher C N of AgCl45. A piece of Cu and another of Ge are cooled from room temp. to 80 K. The resistance of -(a) Each of them increases(b) Cu increases and that of Ge decrease(c) Cu decrease and that of Ge increases(d) Each of them decreases46.If a crystal contains a total of N atoms, and n schottky defects are produced by removing n cations and r anions from the interior of the crystal then -

47. Choose the incorrect statement ?(a) The crystal structure of rock salt in an fcc array of anions in which cations occupy all the octahedral voids(b) The sphalerite crystal structure is an expanded fcc anion lattice with cations occupying one type of tetrahedral hole.(c) In fluorite structure, cations occupy half the cubic holes of a primitive cubic array of anions.(d) None of the above.48.A solid has 3 types of atoms namely x, y and z, x forms a fcc lattice with y atoms occupying all the tetrahedral voids and z atoms occupying half the octahedral voids. The formula of the solid is -(a) X2Y4Z (b) XY2Z2(c) X4Y2Z (d) X4YZ249.KCl crystallises in the same type of lattice as does NaCl calculate the ratio of the side of the unit cell for KCl to that for NaCl

(a) 1.222 (b) 1.224 (c) 1.414 (d) 0.73250. Some polar crystals produce small electric current on heating. This phenomenon is called-(a) Piezo electricity (b) Pyroelectricity(c) Ferroelectricity (d) Anti ferroelectricity