Solid State Practice Sheet Prayas JEE 2024 PDF

JEE PRAYAS JEE CHEMISTRY...

JEE PRAYAS JEE CHEMISTRY SOLID STATE Q1 Pure Silicon and Germanium at 0K are (C) √3a 2 (A) Conductors (B) Insulators (D) 2a √3 (C) Semiconductors (D) None Q8 Which of the following has Frenkel defect? Q2 In the calcium Fluoride structure, the (A) NaCl coordination number of the cations and anions (B) Graphite are respectively: (C) NaBr (A) 6 and 6 (B) 8 and 4 (D) Diamond (C) 4 and 4 (D) 4 and 8 Q9 Which of the following fcc structures contains Q3 In - a tetragonal crystal cations in alternate tetrahedral voids? (A) a = b = c; α = β = 90− ≠ γ (A) NaCl (B) α ∘ = β = γ = 90 ; a = b ≠ c (B) ZnS (C) α ∘ = β = γ = 90 ; a ≠ b ≠ c (C) Na2 O (D) α ∘ ∘ = β = 90 , γ = 120 ; a = b ≠ c (D) CaF2 Q4 In the crystals of which of the following ionic Q10 The appearance of colour in solid alkali metal compounds would you expect maximum halides is generally due to: distance between cations and anions? (A) Frenkel defect (A) LiF (B) Schottky defect (B) CsF (C) F-centres (C) CsI (D) None (D) LiI Q11 Which of the following shows ferrimagnetism? Q5 The ratio of Fe3+ and Fe2+ ions in Fe0.9 S is (A) TiO2 (A) 0.28 (B) 0.5 (B) CrO2 (C) 2 (D) 4 (C) MnO Q6 In NaCl , the chloride ions occupy the space in (D) Fe3 O4 a fashion of: Q12 The fraction of total volume occupied by the (A) f cc atoms present in a simple cube is: (B) bcc (A) π (C) scc 4 (B) π (D) hcp 6 (C) π 3√ 2 Q7 The interionic distance for cesium chloride (D) π 4√ 2 crystal will be: (A) a Q13 If NaCl is doped with 10 −4 mol%SrCl2 , the (B) a concentration of cation vacancies will be: 2 Android App | iOS App | PW Website  JEE (NA = 6.02 × 10 23 mol −1 ) mass is 197amu. Read the above (A) 6.02 × 10 14 mol −1 comprehension carefully and answer the (B) 6.02 × 10 15 mol −1 following question. The coordination number of (C) 6.02 × 10 16 mol −1 gold atom in the crystal is: (D) 6.02 × 10 17 mol −1 (A) 4 (B) 6 (C) 8 (D) 12 Q14 The crystal system of a compound with unit cell dimension a = 0.387; b = 0.387 and Q20 In X-Ray studies, the packing of atoms in a c = 0.504 and crystal of gold is found to be in layers such that α = β = 90 ∘ and γ = 120 ∘ is: starting from any layer, every fourth layer is (A) Cubic (B) Hexagonal found to be exactly identical. The density of (C) Orthorhombic (D) Rhombohedral gold is found to be 19.4 gcc −1 and its atomic mass is 197amu. Read the above Q15 A semiconductor of Ge can be made p-type by comprehension carefully and answer the adding: following question. The fraction occupied by (A) Trivalent Impurity gold atoms in the crystal is: (B) Tetravalent impurity (A) 0.52 (B) 0.68 (C) Pentavalent impurity (C) 0.74 (D) None (D) None Q21 Q16 Graphite is: (A) Good conductor (B) sp2 - hybridised (C) Amorphous solid (D) Covalent crystal Q17 Which of the following is/are true? (A) In NaCl crystals, Na + ions are in all octahedral voids. (A) A − R; B − P; C − S; D − Q (B) In zinc blende, Zn 2+ ions are present in (B) A − R; B − P; C − Q; D − S alternate tetrahedral voids (C) A − R; B − Q; C − S; D − P (C) In CaF2 , F − ions occupy all tetrahedral (D) A − Q; B − R; C − S; D − P voids (D) In Na2 O, O 2− ions occupy half the Q22 Match Column I with Column II octahedral voids Q18 Crystal system(s) in which no two axial lengths are equal? (A) Tetragonal (B) Orthorhombic (C) Monoclinic (D) Triclinic Q19 In X-Ray studies, the packing of atoms in a crystal of gold is found to be in layers such that starting from any layer, every fourth layer is (A) A − R; B − Q; C − P; D − S found to be exactly identical. The density of (B) A − R; B − Q; C − Q; D − S gold is found to be 19.4 gcc −1 and its atomic (C) A − R; B − Q; C − P; D − P Android App | iOS App | PW Website  JEE (D) A − Q; B − R; C − P; D − S Q23 The number of atoms in 100 g of fcc crystal with density = 10.0 gcc −1 and cell edge equal to 200pm is equal to x × 1024. The value of x is Q24 To get n-type doped semiconductor, the impurity to be added to Si should have....................... valence electrons. Q25 The number of octahedral voids in fcc unit cell that are not shared with other unit cells is............... Android App | iOS App | PW Website  JEE Answer Key Q1 (B) Q14 (B) Q2 (B) Q15 (A) Q3 (B) Q16 (A, B, D) Q4 (C) Q17 (A, B, C) Q5 (A) Q18 (B, C, D) Q6 (A) Q19 (D) Q7 (C) Q20 (C) Q8 (C) Q21 (A) Q9 (B) Q22 (B) Q10 (C) Q23 5 Q11 (D) Q24 5 Q12 (B) Q25 1 Q13 (D) Android App | iOS App | PW Website