Solid State TestSolid State 47 Created on July 05, 2023 By Arvind SirSolid State English Medium 1 / 30Graphite is an example of - Molecular Solid Covalent Solid Metallic crystal Ionic Solid 2 / 30In a body centred cubic arrangement, the number of atoms per unit cell is – 8 1 2 4 3 / 30The vacant space in B.C.C unit cell is – 32% 10% 23% 46% 4 / 30Total volume of atoms present in BCC unit cell of metal is (r=atomic radius) 20 𝜋𝑟3/3 12 𝜋𝑟3/3 8 𝜋𝑟3/3 24 𝜋𝑟3/3 5 / 30The number of atoms present in a simple cubic unit cell are – 1 4 2 3 6 / 30Bragg’s law in given by the equation 𝑛 = 2θ sin θ 𝑛 = 2𝑑 sin 𝜃 𝑛 θ 2 = d sin 𝜃 2 2𝑛 = 𝑑 sin 𝜃 7 / 30The empty space in this HCP unit cell- 74% 32% 47.6% 26% 8 / 30Which among the following will show anisotropy – Glass Barium Chloride Paper Wood 9 / 30The rank (effective atoms per unit cell) of a cubic unit cell is 4. The type of cell as – Primitive None of these Body centred Face Centred 10 / 30In a face centred cubic arrangement of A & B atoms whose A atoms are at the corner of the unit cell & B atoms at the face One of the A atom is missing from one corner in unit cell. The simplest formula of compound is– A7/8B3 A7B24 A7B3 AB3 11 / 30How many atoms are there in a unit cell of Mg which forms hexagonal crystals– 6 8 4 12 12 / 30The structure of sodium chloride crystal is – Square planar Octahedral Face centred cubic lattice Body centred cubic lattice 13 / 30Which of the following does not exhibit frenkel defect AgCl CsCl AgBr ZnS 14 / 30Which is amorphous solid – Plastic Glass Rubber All of thise 15 / 30In a compound, atoms of element Y form ccp lattice and those of element X occupy 2/3rd of tetrahedral The formula of the compound will be – X2Y X3Y4 X4Y3 X2Y3 16 / 30The unit cell of a metallic element of atomic mass 108 and density 5g/cm3 is a cube with edge length of 409 pm. The structure of the crystal lattice is – fcc bcc hcp None of these 17 / 30The total number of Bravais lattice in a crystal is 7 32 23 14 18 / 30In a face centred cubic unit cell, an atom at the face centre is shared by – 6 unit cells 1 unit cells 2 unit cells 4 unit cells 19 / 30The no. of atoms per unit cell in B.C.C & F.C.C is respectively – 1,3 1,2 2,4 8, 10 20 / 30Which of the following defect, if present lowers the density of the crystal – Constitution of F- Centers Schottky Interstitial cation Frenkel 21 / 30Crystals can be classified into......... basic crystal habits 3 4 14 7 22 / 30In Corundum, oxide ions are arrangement in hcp arrangement and aluminum ion occupy two third of the octahedral Its formula is – Al3O4 Al2O4 AlO2 Al2O3 23 / 30Close packing is maximum in the crystal bcc None of these fcc Simple cube 24 / 306 : 6 of NaCl coordination changes to 8: 8 coordination on – no effect on coordination number Applying high P both (a) and (b) increase in temperature 25 / 30In a close pack array of N spheres, the number of tetrahedral holes are – 4N N 2N N/2 26 / 30What is the simplest formula of a solid whose cubic unit cell has the atom A at each corner, the atom B at each face centre and a C atom at the body centre– AB2C A2BC AB3C ABC3 27 / 30The number of atoms in 100 g of fcc crystal with density (d) = 10 g cm-3 and edge length 200 pm is equal to 3x1025 5x1024 1x1025 2x1025 28 / 30Doping of silicon (Si) with boron (B) leads TO Metal Insulator p-type semiconductor n-type semiconductor 29 / 30The maximum percentage of available volume that can be filled in a face centred cubic system by an atom is – 26% 34% 74% 68% 30 / 30A solid is made of two elements X and Z . The atom Z are in C.C.P. arrangement while atoms X occupy all the tetrahedral sites. What is the formula of the compound- Unpredictable XZ X2Z XZ2 Your score isThe average score is 43% LinkedIn Facebook VKontakte 0% Restart quiz