This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part I > Class 12 Chemistry (Part I) Chapter 1 Solid State – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 21 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Packing fractions of BCC unit cell is A) 68%. B) 7.4%. C) 52.4%. D) 0.68%. Show Answer Correct Answer: D) 0.68%. 2. Ccp tallies with A) Bcc. B) Fcc. C) Hcp. D) None of these. Show Answer Correct Answer: B) Fcc. 3. Name the three types of crystal systems. A) Monoclinic. B) Triclinic. C) Cubic, Tetragonal, Orthorhombic. D) Hexagonal. Show Answer Correct Answer: C) Cubic, Tetragonal, Orthorhombic. 4. True or False:Amorphous solids have only a short range order A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 5. Repeatable entity of a crystal structure is known as A) Miller indices. B) Crystal. C) Unit cell. D) Lattice. Show Answer Correct Answer: C) Unit cell. 6. In a crystal of sodium chloride, the sodium ions occupy: A) All octahedral voids. B) All tetrahedral voids. C) Both octahedral and tetrahedral voids. D) None of the above. Show Answer Correct Answer: A) All octahedral voids. 7. The energy gap between between filled valence band and the conduction band is very small in this electron can easily jump from one band to another A) Semiconductor. B) Other. C) Metals. D) Insulators. Show Answer Correct Answer: C) Metals. 8. Iron body centred cubic unit cell with a cell edge of 286.65 pm. The density of iron is 7.87 g cm$^{-3}$. Use this information to calculate Avogardo's number (At.mass of Fe=56 g mol$^{-1}$). A) 6.04X10$^{23}$. B) 6.08X10$^{23}$. C) 6.02X10$^{23}$. D) 6.01X10$^{23}$3. Show Answer Correct Answer: A) 6.04X10$^{23}$. 9. ..... % of ..... is used as an antifreeze in cars for cooling engine A) 35, ethylene glycol. B) 25, elthylene. C) 35, ethyl glycol. D) 40, ethyl glycol. Show Answer Correct Answer: A) 35, ethylene glycol. 10. Both diamond and rhombic sulfur are covalent solids but the latter has a very low melting point than the former. Explain why? A) Because diamond is a crystal. B) Because diamond has strong interatomic forces. C) Because diamond is an allotrope of carbon. D) Because diamond cannot be broken. Show Answer Correct Answer: B) Because diamond has strong interatomic forces. 11. An element (atomic mass = 27) has a density of 2.7 g cm$^{-3}$ If edge length of the cell is 40.7 nm. what is the nature of the cubic unit cell? A) Simple cube unit cell. B) FCC. C) BCC. D) None. Show Answer Correct Answer: B) FCC. 12. Coordination number for closest packed crystal structure A) 4. B) 16. C) 12. D) 8. Show Answer Correct Answer: C) 12. 13. Compound that can exhibit Frenkel as well as Schottky defect is A) ZnS. B) AgCl. C) NaCl. D) AgBr. Show Answer Correct Answer: D) AgBr. 14. Constituent particle present in corners and body center A) SC. B) ECC. C) BCC. D) FCC. Show Answer Correct Answer: C) BCC. 15. Which set of miller indices gives x-ray intensity in bcc A) (220), (311), (222). B) (220), (222), (321). C) (200), (111), (311). D) (400), (111), (200). Show Answer Correct Answer: B) (220), (222), (321). 16. At room temperature Fe$_{3}$O$_{4}$ is A) Paramagnetic. B) Ferrimagnetic. C) Ferromagnetic. D) Diamagnetic. Show Answer Correct Answer: B) Ferrimagnetic. 17. A substance A$_{x}$B$_{y}$ crystallizes in a face centred cubic (fcc) lattice in which atoms A occupy each corner of the cube and atoms B occupy the centres of each face of the cube. Identify the correct composition of the substance A$_{x}$B$_{y}$: A) AB$_{3}$. B) A$_{3}$B. C) A$_{4}$B$_{3}$. D) COMPOSITION CAN NOT BE SPECIFIED. Show Answer Correct Answer: A) AB$_{3}$. 18. How many atoms can be assigned to its unit cell if an element forms a face-centered cubic cell? A) 2. B) 3. C) 4. D) 1. Show Answer Correct Answer: C) 4. 19. The starting torque of a D.C. motor is independent of which of the following? A) Flux. B) Armature current. C) Flux and armature current. D) Speed. Show Answer Correct Answer: D) Speed. 20. The main disadvantage of Ward leonard control is A) Less noise. B) Smooth armature current. C) Wide range of speed control. D) High initial cost. Show Answer Correct Answer: D) High initial cost. 21. Analysis shows that a metal oxide has a empirical formula M$_{0.98}$O. The percentage M$^{3+}$ ions in this crystal would be A) 4.08%. B) 5.08%. C) 7.01%. D) 6.05%. Show Answer Correct Answer: A) 4.08%. 22. Structure of a mixed oxide is ccp. Cubic unit cell of mixed oxide is composed of oxide ions.One Fourth of tetrahedral voids are occupied by divalent metal A and all the octahedral voidsare occupied by monovalent metal B. Formula of oxide is. A) ABO$_{2}$. B) AB$_{2}$O$_{2}$. C) A$_{2}$BO$_{2}$. D) A$_{2}$B$_{3}$O$_{4}$. Show Answer Correct Answer: B) AB$_{2}$O$_{2}$. 23. Which of the following statement is incorrect about amorphous solids? A) Anisotropic. B) Rigid and incompressible. C) Melt over a wide range of temperature. D) No orderly arrangement. Show Answer Correct Answer: A) Anisotropic. 24. Is the most common crystal system for metals A) Cubic. B) Tetragonal. C) Monoclinic. D) Trigonal. Show Answer Correct Answer: A) Cubic. 25. In a FCC cell, an atom at the face contributes to the unit cell: A) 1/4 part. B) 1/2 part. C) 1 part. D) 1/8 part. Show Answer Correct Answer: B) 1/2 part. 26. Assertion:No compound has both Schottky and Frenkel defects.Reason:Both defects change the density of the solid. A) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion. B) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion. C) If Assertion is correct but Reason is incorrect. D) If both the Assertion and Reason are incorrect. Show Answer Correct Answer: D) If both the Assertion and Reason are incorrect. 27. Choose correct answer for a diamond cubic (DC) Structure: A) This is a fcc structure with one atom basic. B) It has second nearest neighbor distance $\frac{a}{\sqrt{2}}$. C) It's coordination number is 8. D) This is a closed packed structure. Show Answer Correct Answer: B) It has second nearest neighbor distance $\frac{a}{\sqrt{2}}$. 28. What is the primary reason for the low conductivity of ionic compounds? A) High melting points. B) Presence of free electrons. C) Lack of mobile ions. D) Strong covalent bonds. Show Answer Correct Answer: C) Lack of mobile ions. 29. How many crystal systems in Solid state A) 4. B) 7. C) 6. D) 5. Show Answer Correct Answer: B) 7. 30. How many atoms are there in a BCC crystal unit? A) 8. B) 1. C) 2. D) 4. Show Answer Correct Answer: C) 2. 31. Choose the correct optionassertion-no crystal has both schottky and frenkel defectreason-both defects change density of crystal A) Both assertion and reason are correct and reason is correct explanation of assertion. B) Both assertion and reason are correct but reason is not the correct explanation of assertion. C) Assertion is correct but reason is incorrect. D) Both are incorrect. Show Answer Correct Answer: D) Both are incorrect. 32. The miller indices of plane parallel to x and y axes are A) (100). B) (001). C) (111). D) (010). Show Answer Correct Answer: B) (001). 33. Which one of the following is inverse spinal? A) Fe$_{3}$O$_{4}$. B) FeCr$_{2}$O$_{4}$. C) MgAl$_{2}$O$_{4}$. D) ZnAl$_{2}$O$_{4}$. Show Answer Correct Answer: A) Fe$_{3}$O$_{4}$. 34. The basic elements of an electric drive are A) Electric motor and the transmission system. B) Electric motor, the transmission and control system. C) The transmission and control system. D) Electric motor and conversion equipment. Show Answer Correct Answer: B) Electric motor, the transmission and control system. 35. Which metal is ferromagnetic:- A) Fe. B) Zn. C) Pb. D) Mg. Show Answer Correct Answer: A) Fe. 36. Energy of an electron accordingly to Somerfeld's free electron theory is A) $\frac{n2\pi2h2}{2\pi m2}$. B) $\frac{n2\pi2h}{2\pi m2}$. C) $\frac{3}{2}KT$. D) $\frac{n\pi h}{2ma2}$. Show Answer Correct Answer: A) $\frac{n2\pi2h2}{2\pi m2}$. 37. The most asymmetric crystal system is A) Cubic. B) Triclinic. C) Hexagonal. D) Tetragonal. Show Answer Correct Answer: B) Triclinic. 38. An element with density 11.2 g cm$^{-3 }$forms a f.c.c. lattice with the edge length of 4X10$^{-8}$ cm. Calculate the atomic mass of the element. (Given N$_{A}$ =6.02X10$^{23}$ mol$^{-1}$) A) 197g/mol. B) 63.5g/mol. C) 55g/mol. D) 107.9g/mol. Show Answer Correct Answer: D) 107.9g/mol. 39. What is the atomic packing factor of BCC structure? A) 0.74. B) 0.68. C) 0.96. D) 0.54. Show Answer Correct Answer: B) 0.68. 40. TETRAGONAL CRYSTAL SYSTEM AS THE FOLLOWING UNIT CELL DIMENSIONS A) A=b=c and alpha= beta= gamma=90. B) A=b and alpha= beta= gamma=90. C) Alpha= beta= gamma=90. D) A=b and alpha= beta= 90, gamma= 120. Show Answer Correct Answer: B) A=b and alpha= beta= gamma=90. 41. Among solids, the highest melting point is exhibited by A) Ionic solids. B) Pseudo solids. C) Covalent solids. D) Molecular solids. Show Answer Correct Answer: A) Ionic solids. 42. Which types of solids are called pseudo solids A) Amorphous solids. B) Crystalline solids. C) Both. D) None of the above. Show Answer Correct Answer: A) Amorphous solids. 43. An example of body centered cube is A) Magnesium. B) Sodium. C) Copper. D) Zinc. Show Answer Correct Answer: B) Sodium. 44. An element 'X' (At. mass = 40 g mol$^{-1}$) having f.c.c. structure, has unit cell edge length of 400 pm. Calculate the density of 'X' . A) 41.5 gcm$^{-3}$. B) 4.15 gcm$^{3}$. C) 0.415 gcm$^{-3}$. D) 4.15 gcm$^{-3}$. Show Answer Correct Answer: D) 4.15 gcm$^{-3}$. 45. In 3D, all unit cells must be: A) Hexagons. B) Pentagons. C) Cubes. D) Parallelpipeds. Show Answer Correct Answer: D) Parallelpipeds. 46. Bravais lattices are of: A) 8 types. B) 7 types. C) 10 types. D) 14 types. Show Answer Correct Answer: D) 14 types. 47. Doping of Si with P or Al increases the conductivity. the difference in the two cases is A) P gives rise to holes while Al gives rise to extra electrons. B) P is metal whereas Al is a non-metal. C) P is conductor while Al is semiconductor. D) P gives rise to extra electrons while Al gives rise to holes. Show Answer Correct Answer: D) P gives rise to extra electrons while Al gives rise to holes. 48. Radioactivity of a sample (z = 22) decreases 90% after 10 years.What will be the half-life of the sample? A) 5YEARS. B) 3YEARS. C) 2YEARS. D) 10YEARS. Show Answer Correct Answer: B) 3YEARS. 49. The energy gap between filled valence band and the conduction band is large A) Metal. B) Semiconductor. C) Insulator. D) None of the above. Show Answer Correct Answer: C) Insulator. 50. In a four quadrant mode of operation, First quadrant represents: A) Reverse Braking operation. B) Reverse Motoring operation. C) Forward Braking operation. D) Forward Motoring. Show Answer Correct Answer: D) Forward Motoring. 51. An ionic compound of X and Y has NaCl type structure. If radius of Y(-) is 200 pm then the ideal radius of X(+) idealy will be, A) 45 pm. B) 30 pm. C) 50 pm. D) 82.8 pm. Show Answer Correct Answer: D) 82.8 pm. 52. What is the main information provided by the spacing of peaks in a diffractogram? A) The elements present in the sample crystals. B) Which crystal group the sample belongs to. C) The number of crystals in the sample. D) The number of X-rays absorbed by the sample. E) All of the above. Show Answer Correct Answer: B) Which crystal group the sample belongs to. 53. Holding current is ..... than Latching Current A) Directly propotional. B) Equal. C) Higher. D) Lesser. Show Answer Correct Answer: D) Lesser. 54. In solid state welding, why might the capital investment be higher compared to other welding methods? A) It requires skilled operators. B) It involves complex welding processes. C) It produces poor-quality welds. D) The weld quality and suitability are more favorable. Show Answer Correct Answer: D) The weld quality and suitability are more favorable. 55. An element (atomic mass = 60) having FCC unit cell has a density of 6.23g cm$^{-3}$ .What is the edge length of the unit cell? A) 10 nm. B) 20 nm. C) 40 nm. D) 30 nm. Show Answer Correct Answer: C) 40 nm. 56. How many atoms are present in body centred unit cell A) 3. B) 1. C) 2. D) 4. Show Answer Correct Answer: C) 2. 57. The total number of tetrahedral voids and octahedral voids per unit cell of face-centred cell (fcc) are A) 2, 4. B) 8, 4. C) 4, 2. D) 4, 8. Show Answer Correct Answer: B) 8, 4. 58. ..... set of integers used to describe planes in a crystal A) Weiss indices. B) Term symbols. C) Miller indices. D) Symmetry elements. Show Answer Correct Answer: C) Miller indices. 59. The coordination number in hexagonal close packing (hcp) in 2 dimensional arrangement is A) 8. B) 6. C) 2. D) 4. Show Answer Correct Answer: B) 6. 60. When laser light is focussed on a particular area for a long time, then that particular area alone will be heated. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Chemistry (Part I) Chapter 1 Solid State Quiz 1Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 2Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 3Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 4Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 5Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 6Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 7Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books