This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 1 Solid State – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Solids which are anisotropic in nature are A) Amorphous solids. B) Crystalline solids. C) Both. D) None of the above. Show Answer Correct Answer: B) Crystalline solids. 2. P-type semiconductors are formed When Si or Ge are doped with A) Group 14 elements. B) Group 15 elements. C) Group 13 elements. D) Group 18 elements. Show Answer Correct Answer: C) Group 13 elements. 3. Which of the following statements are true about semiconductors?I. Silicon doped with electron rich impurity is a p-type semiconductorII. Silicon doped with electron rich impurity is an n-type semiconductorIII. Delocalized electrons increase the conductivity of doped siliconIV. An electron vacancy increases the conductivity of n-type semiconductor A) I, II, III and IV. B) II, IV. C) II, III. D) III, IV. Show Answer Correct Answer: C) II, III. 4. Lead (II) sulphide crystal has NaCl structure. What is the distance between Pb$^{2+}$ and S$^{2-}$ in PbS if its density is 12.7 g cm $^{3-}$? (At. mass of Pb =207) A) 450PM. B) 300PM. C) 250PM. D) 200PM. Show Answer Correct Answer: C) 250PM. 5. D.C. series motors are used A) Where load is constant. B) Where load changes frequently. C) Where constant operating speed is needed. D) In none of the above situations. Show Answer Correct Answer: D) In none of the above situations. 6. Name the type of point defect that occur in crystal of zinc sulphide A) Frenkel defect. B) Schottky defect. C) Both. D) None of the above. Show Answer Correct Answer: A) Frenkel defect. 7. The number of atoms present in fcc = ..... A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: D) 4. 8. In a four quadrant mode of operation, fourth quadrant represents: A) Forward Motoring. B) Forward Braking. C) Reverse Motoring. D) Reverse Braking. Show Answer Correct Answer: D) Reverse Braking. 9. Each of the following solids show, the Frenkel defect except A) ZnS. B) AgBr. C) AgI. D) KCl. Show Answer Correct Answer: D) KCl. 10. Explain the concept of the Fermi level in semiconductors. A) The Fermi level is the energy required to ionize a semiconductor completely. B) The Fermi level is the maximum energy level of holes in a semiconductor. C) The Fermi level is the temperature at which a semiconductor operates. D) The Fermi level is the energy level that indicates the probability of electron occupancy in a semiconductor, crucial for understanding its electrical properties. Show Answer Correct Answer: D) The Fermi level is the energy level that indicates the probability of electron occupancy in a semiconductor, crucial for understanding its electrical properties. 11. Which symmetry operation describes a rotation plus translation? A) Screw axis. B) Roto-transition. C) Glide plane. D) Rotoinversion. Show Answer Correct Answer: A) Screw axis. 12. A substance is ferromagnetic at room temperature, on heating to a certain temperature it becomes A) Paramagnetic. B) Diamagnetic. C) Ferrimagnetic. D) Antiferromagnetic. Show Answer Correct Answer: A) Paramagnetic. 13. The process of adding an impurity to an intrinsic semiconductor is called A) Atomic modification. B) Ionization. C) Recombination. D) Doping. Show Answer Correct Answer: D) Doping. 14. The prefix "nano" comes from a A) French word meaning billion. B) Spanish word meaning particle. C) Latin word meaning invisible. D) Greek word meaning dwarf. Show Answer Correct Answer: D) Greek word meaning dwarf. 15. Imagine you're choosing a storage device for your laptop that you often carry in your backpack. Which solid-state characteristic means it's less likely to get damaged from being jostled around, as it has no moving parts? A) Cost. B) Durability. C) Portability. D) Speed. Show Answer Correct Answer: B) Durability. 16. Which among the following is the equation for Avogadro's law A) P$_{1}$V$_{1}$=P$_{2}$V$_{2}$. B) T=k*V. C) V$_{1}$N$_{1}$=V$_{2}$N$_{2}$. D) V$_{1}$/n$_{1}$=V$_{2}$/n$_{2}$. Show Answer Correct Answer: D) V$_{1}$/n$_{1}$=V$_{2}$/n$_{2}$. 17. What is the primary bonding type in ionic crystals? A) Ionic bonding. B) Metallic bonding. C) Van der Waals forces. D) Covalent bonding. Show Answer Correct Answer: A) Ionic bonding. 18. ZnO (sejuk) A) White, soluble. B) White, insoluble. C) Yellow, soluble. D) Yellow, insoluble. Show Answer Correct Answer: B) White, insoluble. 19. For what substances is the solid state less dense than the liquid state? A) No liquids. B) Most liquids other than water. C) Water. D) All liquids. Show Answer Correct Answer: C) Water. 20. If a crystal lattice of a compound, each corner of a cube is enjoyed by sodium, each edge centre of a cube has oxygen and centre of a cube is enjoyed b tungsten (W), then give its formula A) Na$_{2}$WO$_{4}$. B) NaWO$_{3}$. C) Na$_{3}$WO$_{3}$. D) Na$_{2}$WO$_{3}$. Show Answer Correct Answer: B) NaWO$_{3}$. 21. An alloy of copper, silver and gold is found to have copper constituting the ccp lattice.If silver atoms occupy the edge centres and gold present at body centre, the alloy has formula A) Cu$_{4}$Ag$_{2}$Au. B) Cu$_{4}$Ag$_{4}$Au. C) Cu$_{4}$Ag$_{3}$Au. D) CuAgAu. Show Answer Correct Answer: C) Cu$_{4}$Ag$_{3}$Au. 22. Assertion:In crystalline solids, the value of resistance is diffierent in different directions. Reason:Crystalline solids are isotropic in nature. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true, but reason is not the correct explanation of assertion. (c) If assertion is true, but reason is false. (d) If both assertion and reason are false. A) A. B) B. C) C. D) D. Show Answer Correct Answer: C) C. 23. For a van der Waals gas, the correction to pressure accounts for: A) Molecular size. B) Intermolecular attractions. C) Both (a) and (b). D) Only temperature. Show Answer Correct Answer: B) Intermolecular attractions. 24. Which type of defect has the presence of cations in the interstitial site? A) Schottky defect. B) Frenkel defect. C) Metal deficiency defect. D) Vacancy defect. Show Answer Correct Answer: B) Frenkel defect. 25. Assertion (A)-The packing efficiency is maximum of the fcc Reason (R)-The coordination number is 12 in fcc structures structure A) Both (A) and (R) are correct and (R) is the correct explanation of (A). B) Both (A) and (R) are correct but (R) is not the correct explanation of (A). C) A) is correct but (R) is incorrect. D) (A) is incorrect but (R) is correct. Show Answer Correct Answer: B) Both (A) and (R) are correct but (R) is not the correct explanation of (A). ← PreviousNext →Related 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 9Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 10Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books