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Chemistry

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Published in: Chemistry
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MCQ Questions-Solid State

Mazhar P / Ahmedabad

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Qualification: M.Sc., B.Ed.

Teaches: Chemistry, Biology, Mathematics, Physics

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  1. Xll CHEMISTRY SHODHAN INSTITUTE Unit 1 Solid State Total: 30 M Ques. No. 1 to 10 are of 1 mark each. Ques. No. 11 to 20 are of 2 marks each. (1)The ability of a given substance to assume two or more crystalline structure is called- (a)Amorphism (b)lsomorphism (c)polymorphism (d)lsomerism (2) The number of octahedral void(s) per atom present in a ccp structure is: (d)4 (3)An ionic compound has a unit cell consisting of "A" ions at the corners of a cube and "B' ions on the centres of the faces of the cube. The empirical formula for this compound will be- (a)A2B (b)AB (c)A3B (4)Total volume of atoms present in a fcc unit cell of a metal is (d)AB3 7tr3 (r is atomic radius) (ap 7tr3 3 16 3 (5) When electrons are trapped into the crystal in anionic vacancy, the defect is known as (a)Schottky defect (c)Stoichiometric defect (b)Frenkel defect (d)Metal excess defect (6)Copper crystallises in fcc with a unit cell length of 361 pm. What is the radius of copper atom? (a) 108 pm (b)127 pm (c)157 pm (d)181 pm (7) The formula for determination of density of unit cell is- a3X N A (8)Percentage of free space in ccp structure and bcc structure are respectively (9) Which one of the following has frenkel defect? (a)sodium chloride (b)Graphite (c)silver bromide (d)Diamond (10)Lithium forms body centred cubic structure. The length of the side of its unit cell is 351 pm. Atomic radius of the lithium will be (a)75 pm (b)300 pm (c)240 pm (d)152 pm
  2. (11)How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1 g? (a)1.28 x 1021 (b)1.71 x 1021 (c)2.57 x 1021 (d)5.14 x 1021 (12)A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of The anion(Y-) will be: (a)275.1 pm (b)322.5 pm (c)241.5 pm (d)165.7 pm (13)A metal crystallizes wih a fcc lattice. The edge length of the unit cell is 408 pm. The diameter of the metal atom is: (a)288 pm (b)408 pm (c)144 pm (d)204 pm (14) AB crystallizes in bcc lattice with edge length equal to 387 pm. The distance between two Oppositely charged ions in the lattice is: (a)335 pm (b)250 pm (c)200 pm (d)300 pm (15)Structure of mixed oxide is ccp. The unit cell of mixed oxide is composed of oxide ions. 1/4th of the tetrahedral voids are occupied by divalent metal "A" and the octahedral voids are occupied by a monovalent metal "B". The formula of the oxide is: (a)AB02 (b)A2B02 (c)A2B 304 (d)AB202 (16)CsBr crystal has bcc structure. It has an edge length of 4.3 A. The shortest interionic distance between Cs+ and Br- is: (a) 1.86'A (b)3.72'A (c)4.3 A (d) 7.44'A (17)sodium metal crystallizes as a bcc lattice with the cell edge 4.29A. What is the radius of sodium atom? (a)1.857 x 10-8 cm (b)2.371 x 10-7 cm x 10-8 cm (d)9.312x 10-7 cm (18) In a compound, atoms of element Y form ccp lattice and those of element X occupy of the tetrahedral voids. The formula of the compound will be- (a)X2Y3 (b)X2Y (c)X3Y4 (d)X4Y3 (19) In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is: (a)A2B (b)AB2 (c)A2B3 (d)A2B5 (20) The edge length of a fcc unit cell of an ionic compound is 508 pm. If the radius of the cation is 110 pm, the radius of anion is- (a)288 pm (b)398 pm (c)618 pm (d) 144 pm

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