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 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are phonons in the context of solid-state physics? A) Elementary excitations representing atomic lattice vibrations. B) Particles that carry electric charge. C) Atoms in a crystal lattice. D) None of the above. Show Answer Correct Answer: A) Elementary excitations representing atomic lattice vibrations. 2. In a Joule-Thomson expansion, cooling occurs when: A) The inversion temperature is below the gas temperature. B) The inversion temperature is above the gas temperature. C) The process is adiabatic. D) The process is isothermal. Show Answer Correct Answer: B) The inversion temperature is above the gas temperature. 3. What is a common use for memory cards? A) Desktop computer storage. B) Operating system installation. C) Digital cameras and camcorders. D) Storing large databases. Show Answer Correct Answer: C) Digital cameras and camcorders. 4. What is the total number of atoms per unit cell in a face centered cubic structure? A) 1. B) 3. C) 4. D) 2. Show Answer Correct Answer: C) 4. 5. The limiting value of CsCl. is ..... A) 0.93. B) 0.414. C) 1.0. D) 0.732. Show Answer Correct Answer: A) 0.93. 6. In CsCl the coordination number is ..... A) 8:4. B) 8:8. C) 4:4. D) 6:6. Show Answer Correct Answer: B) 8:8. 7. Top down technology refers to nanomaterials as A) Making structures by machining and etching technique. B) By sputtering technique. C) Using thin films. D) Using molecular technique. Show Answer Correct Answer: A) Making structures by machining and etching technique. 8. A metal crystallizes in a body-centered cubic structure. If 'a' is the edge length of its unit cell, 'r' is the radius of the sphere. What is the relationship between 'r' and 'a'? A) $r=\frac{\sqrt[]{3}}{4}a$. B) $r=\frac{a}{2}$. C) $r=\frac{a}{2\\sqrt[]{2}}$. D) None of these. Show Answer Correct Answer: A) $r=\frac{\sqrt[]{3}}{4}a$. 9. Discuss the dielectric properties of materials in the context of solid state physics. A) Dielectric properties are only relevant in liquid state physics. B) Dielectric properties are related to the mechanical strength of materials. C) Dielectric properties are determined by the color of materials. D) Dielectric properties of materials in solid state physics relate to their ability to store electrical energy in an electric field, characterized by permittivity. Show Answer Correct Answer: D) Dielectric properties of materials in solid state physics relate to their ability to store electrical energy in an electric field, characterized by permittivity. 10. The order of magnitude of the energy gap of a typical semiconductor is A) 9 eV. B) 0 eV. C) 10 eV. D) 1-6 eV. Show Answer Correct Answer: D) 1-6 eV. 11. Number of atoms in a body centered unit cell A) 3. B) 2. C) 1. D) 4. Show Answer Correct Answer: B) 2. 12. Flame proof motors are used in A) Paper Mills. B) Steel mills. C) Explosive atmospheres. D) Moist atmospheres. Show Answer Correct Answer: C) Explosive atmospheres. 13. AN ANGLE OF FOUR FOLD AXIS OF SYMMETRY IS ..... A) 60. B) 360. C) 90. D) 120. Show Answer Correct Answer: C) 90. 14. What is the effect of increasing temperature on the electrical conductivity of metals A) No change. B) Decreases. C) Can't predicted. D) Increases. Show Answer Correct Answer: B) Decreases. 15. Which Cubic cell has highest packing fraction? A) SC. B) BCC. C) FCC. D) No One. Show Answer Correct Answer: C) FCC. 16. Number of atoms per unit cell in FCC lattice is ..... A) 2. B) 1. C) 3. D) 4. Show Answer Correct Answer: D) 4. 17. Which of the following crystals has the largest lattice energy A) KCL. B) RbI. C) NaF. D) Mgo. Show Answer Correct Answer: D) Mgo. 18. Which of the following is dynamic braking? A) Reversal of field connections. B) Reversal of armature connections. C) Addition of equal and opposite field. D) Removal of armature circuit from current machine circuit. Show Answer Correct Answer: D) Removal of armature circuit from current machine circuit. 19. Which of the following oxides shows electrical properties like metals? A) SiO$_{2}$. B) CrO$_{2}$. C) SO$_{2}$. D) MgO. Show Answer Correct Answer: B) CrO$_{2}$. 20. Which device can be used in a chopper circuit? A) GTO. B) IGBT. C) MOSFET. D) ALL. Show Answer Correct Answer: D) ALL. 21. Dv/dt protection is provided to the SCR by A) Connecting a capacitor in parallel with the load. B) Connecting an inductor in series with the load. C) Connecting a capacitor & resister in parallel with the device. D) Connecting an inductor & resister in parallel with the device. Show Answer Correct Answer: C) Connecting a capacitor & resister in parallel with the device. 22. A solid having ccp array, has two atoms P and Q. P occupies lattice points and Q all the octahedral voids. What is the formula of the compound A) PQ. B) PQ$_{2}$. C) P$_{2}$Q. D) None of the above. Show Answer Correct Answer: A) PQ. 23. The number of atoms in 100 g of a face crystal with density = 10 g/cm and cell edge equal to200 pm is equal to. A) 6x10$^{23}$. B) 5x10$^{24}$. C) 2x10$^{25}$. D) 5x10$^{25}$. Show Answer Correct Answer: B) 5x10$^{24}$. 24. The total number of possible 3-dimensional arrangements in a crystal lattice A) 7. B) 8. C) 12. D) 14. Show Answer Correct Answer: D) 14. 25. What is F centre A) Farbe centre. B) Fossil centre. C) Finish centre. D) None of the above. Show Answer Correct Answer: A) Farbe centre. 26. How many unit cells share a face in a crystal lattice A) 2. B) 4. C) 8. D) 1. Show Answer Correct Answer: A) 2. 27. A nonelectrolyte is ..... A) The rapid, random movement of particles in colloidal dispersion. B) A substance that dissolves in water and conducts electric current. C) A substance that dissolves in water and does not conduct electric current. D) The solution process when water is the solvent. Show Answer Correct Answer: C) A substance that dissolves in water and does not conduct electric current. 28. ..... has least range of speed control A) Synchronous motor. B) DC shunt motor. C) Schrage motor. D) Slip ring induction motor. Show Answer Correct Answer: A) Synchronous motor. 29. Frenkel defect is caused due to ..... A) An ion missing from the normal lattice site creating a vacancy. B) The shift of a positive ion from its normal lattice site to an interstitial site. C) An extra positive ion occupying an interstitial position in the lattice. D) An extra negative ion occupying an interstitial position in the lattice. Show Answer Correct Answer: B) The shift of a positive ion from its normal lattice site to an interstitial site. 30. Which is an exact differential? A) DU. B) DW. C) Dq. D) DQ. Show Answer Correct Answer: A) DU. 31. Their constituent particles (atoms, molecules or ions) have fixed positions and can only oscillate about their mean positions. A) Liquid. B) Gas. C) Plasma. D) Solid. Show Answer Correct Answer: D) Solid. 32. The vapour pressure of acetone at 20$^{O}$C is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20$^{O}$C, its vapour pressure was 183 torr. The molar mass (g mol$^{-1}$) of the substance is: A) 32. B) 128. C) 64. D) 488. Show Answer Correct Answer: C) 64. 33. What are the capacitive effects observed in a PN junction? A) Resistance capacitance and thermal capacitance. B) The capacitive effects observed in a PN junction include junction capacitance and diffusion capacitance. C) Voltage drop and current gain effects. D) Inductive effects and magnetic capacitance. Show Answer Correct Answer: B) The capacitive effects observed in a PN junction include junction capacitance and diffusion capacitance. 34. The transition oxide which resembles copper in its appearance and conductivity is A) TiO. B) MnO. C) ReO$_{3}$. D) FeO. Show Answer Correct Answer: C) ReO$_{3}$. 35. Amorphous solid can also be called ..... I.pseudo solidsII.true solidsIII.super cooled liquidsIV.super cooled solids A) I, II, III and IV. B) I, III. C) II, III and IV. D) II, III. Show Answer Correct Answer: B) I, III. 36. Butter and glass are examples of amorphous solids. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 37. Untuk membentuk ikatan yang kuat, antar muka harus terkontaminasi oksida, residu, cairan pengerjaan logam, kontaminan lain, dan bahkan lapisan gas yang teradsorpsi. A) Benar. B) Salah. C) All the above. D) None of the above. Show Answer Correct Answer: B) Salah. 38. A DC machine that runs as a motor will also operate as a A) Rectifier. B) Converter. C) Inverter. D) Generator. Show Answer Correct Answer: D) Generator. 39. Which of the following is true about the value of refractive index of quartz glass? A) Same in all directions. B) Different in different directions. C) Cannot be measured. D) Always zero. Show Answer Correct Answer: A) Same in all directions. 40. What is the significance of area under Maxwell-Boltzmann curve A) The area will give the maximum fraction of molecules at a particular temperature. B) It will give the total number of molecules in the gas. C) It is an indication of probability of molecules. D) It is a measure of molecules with high velocity. Show Answer Correct Answer: B) It will give the total number of molecules in the gas. 41. The coordination number of a metal crystalising in hcp structure is A) 12. B) 4. C) 6. D) 8. Show Answer Correct Answer: A) 12. 42. A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body-centre. What is the formula of the compound? A) P$_{2}$Q. B) PQ$_{2}$. C) PQ. D) PQ$_{4}$. Show Answer Correct Answer: C) PQ. 43. What is an extinction condition? A) Set of hkl values that result in maximum diffraction intensity. B) Cataclysmic event where species start to die off. C) Set of hkl values that result in 0 diffraction intensity. D) None of the above. Show Answer Correct Answer: C) Set of hkl values that result in 0 diffraction intensity. 44. Which welding process requires surfaces to be degreased and scratch-brushed for good bonding characteristics? A) Ultrasonic Welding (USW). B) Diffusion Bonding (DFW). C) Friction Welding (FRW). D) Cold Welding (CW). Show Answer Correct Answer: D) Cold Welding (CW). 45. What parameter is used to optimize the friction welding process? A) Voltage. B) Current. C) Energy and contact pressure. D) Gas flow rate. Show Answer Correct Answer: C) Energy and contact pressure. 46. Based on band theory, conductors are characterized by ..... A) A very wide band gap. B) Overlapping valence and conduction bands. C) A complete absence of electrons. D) Only moving phonons. Show Answer Correct Answer: B) Overlapping valence and conduction bands. 47. What type of solid is SiC A) Metalic. B) Solid. C) Covalant. D) Molecular. Show Answer Correct Answer: C) Covalant. 48. The load cycle for a motor driving a power press will be A) Variable load. B) Continuous. C) Continuous but periodical. D) Intermittent and variable load. Show Answer Correct Answer: D) Intermittent and variable load. 49. Iron oxide crystallises in a hexagonal close-packed array of oxide ions with two out of every three octahedral holes occupied by iron ions. What is the formula of the iron oxide? A) FeO. B) Fe$_{2}$O$_{3}$. C) Fe$_{3}$O$_{4}$. D) None of these. Show Answer Correct Answer: B) Fe$_{2}$O$_{3}$. 50. Statement I:Crystalline solids are anisotropicStatement II:Crystalline solids are not as closely packed as amorphous solids. A) Statement I is true; Statement II is true; Statement II is a correct explanation for Statement I. B) Statement I is true; Statement II is true; Statement II is not a correct explanation for Statement I. C) Statement I is true; Statement II is false. D) Statement I is false; Statement II is true. Show Answer Correct Answer: A) Statement I is true; Statement II is true; Statement II is a correct explanation for Statement I. 51. Describe the concept of effective mass in band theory. A) Effective mass is the mass of an electron in free space. B) Effective mass is a measure of the density of a solid material. C) Effective mass is a parameter that describes how charge carriers behave in a solid, accounting for the effects of the crystal lattice on their motion. D) Effective mass refers to the total mass of a crystal lattice. Show Answer Correct Answer: C) Effective mass is a parameter that describes how charge carriers behave in a solid, accounting for the effects of the crystal lattice on their motion. 52. Assertion:Graphite is a good conductor of electricity however diamond belongs to the category of insulators. Reason:Graphite is soft in nature on the other hand diamond is very hard and brittle. A) A. B) B. C) C. D) D. Show Answer Correct Answer: B) B. 53. For a D.C. shunt motor which of the following is incorrect? A) Unsuitable for heavy duty starting. B) Torque is zero for zero armature current. C) Torque-armature current is a straight line. D) Torque varies as armature current. Show Answer Correct Answer: A) Unsuitable for heavy duty starting. 54. Co-ordination no in hexagonal close packing A) 8. B) 2. C) 4. D) 6. Show Answer Correct Answer: A) 8. 55. Intrinsic semiconductors are those A) Which have high conductivity. B) Which have more holes than electrons. C) Which are made of semiconductor material in its purest form. D) Which have more electrons than holes. Show Answer Correct Answer: C) Which are made of semiconductor material in its purest form. 56. A compound formed by elements X and Y crystallizes in a cubic structure in which atoms X are at the corners of the cube and atoms Y are at the face-centers as well as body centre. The formula of the compound is: A) X3Y. B) XY3. C) XY$_{4}$. D) X$_{4}$Y. Show Answer Correct Answer: C) XY$_{4}$. 57. What is the basic building block of a crystal structure? A) Cells. B) Quarks. C) Atoms. D) Molecules. Show Answer Correct Answer: C) Atoms. 58. The % efficiency of packing in a simple cubic lattice is: A) 68. B) 72. C) 52.4. D) 74. Show Answer Correct Answer: C) 52.4. 59. In graphite electrons are A) Localised on every third carbon atom. B) Spread out between the sheets. C) Localised on each carbon atom. D) Present in antibonding orbital. Show Answer Correct Answer: B) Spread out between the sheets. 60. Which of the following types of solids is represented by substances like glass, rubber, fused silica, plastics etc. A) Polycrystalline. B) Amorphous. C) Crystalline. D) Plasma. Show Answer Correct Answer: B) Amorphous. Next →Related QuizzesScience QuizzesClass 12 QuizzesClass 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 8Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books