This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 1 Solid State – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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$_{3}$. 2. 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. 3. Describe the concept of effective mass in band theory. A) Effective mass refers to the total mass of a crystal lattice. B) 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. C) Effective mass is a measure of the density of a solid material. D) Effective mass is the mass of an electron in free space. Show Answer Correct Answer: B) 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. 4. 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. 5. For a D.C. shunt motor which of the following is incorrect? A) Unsuitable for heavy duty starting. B) Torque varies as armature current. C) Torque-armature current is a straight line. D) Torque is zero for zero armature current. Show Answer Correct Answer: A) Unsuitable for heavy duty starting. 6. Co-ordination no in hexagonal close packing A) 2. B) 4. C) 6. D) 8. Show Answer Correct Answer: D) 8. 7. Intrinsic semiconductors are those A) Which are made of semiconductor material in its purest form. B) Which have high conductivity. C) Which have more holes than electrons. D) Which have more electrons than holes. Show Answer Correct Answer: A) Which are made of semiconductor material in its purest form. 8. 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) X$_{4}$Y. C) XY$_{4}$. D) XY3. Show Answer Correct Answer: C) XY$_{4}$. 9. What is the basic building block of a crystal structure? A) Atoms. B) Quarks. C) Cells. D) Molecules. Show Answer Correct Answer: A) Atoms. 10. The % efficiency of packing in a simple cubic lattice is: A) 52.4. B) 68. C) 74. D) 72. Show Answer Correct Answer: A) 52.4. 11. Silicon is a A) Conductor. B) Semiconductor. C) Superconductor. D) None. Show Answer Correct Answer: B) Semiconductor. 12. In graphite electrons are A) Localised on each carbon atom. B) Spread out between the sheets. C) Localised on every third carbon atom. D) Present in antibonding orbital. Show Answer Correct Answer: B) Spread out between the sheets. 13. 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. 14. Is a type of removable memory card designed for use in digital camera. A) SD. B) XD. C) CFast. D) None of the above. Show Answer Correct Answer: B) XD. 15. Which of the following motors is preferred when smooth and precise speed control over a wide range is desired? A) D.C. motor. B) Squirrel cage induction motor. C) Wound rotor induction motor. D) Synchronous motor. Show Answer Correct Answer: A) D.C. motor. 16. SiO4 (quartz) is A) Crystalline. B) Amorphous. C) Both. D) None of the above. Show Answer Correct Answer: A) Crystalline. 17. Assertion:Crystalline solids have short range order. Reason:Amorphous solids have long range order. A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 18. Is NOT a crystal system A) Cubic. B) Hexagonal. C) Rotorombic. D) Monoclinic. Show Answer Correct Answer: C) Rotorombic. 19. A regular three dimensional arrangements of points in space is called A) Unit cell. B) Lattice point. C) Crystal lattice. D) None of the above. Show Answer Correct Answer: C) Crystal lattice. 20. Einstein's theory of specific heat of solids assumes that the atoms of a solid vibrate simple harmonically ..... A) Like longitudinal waves. B) Like transverse waves. C) All with the same frequency. D) In a complex manner. Show Answer Correct Answer: C) All with the same frequency. 21. How many bravais lattices for Hexagonal A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: A) 1. 22. What is contribution of a lattice point present at the body centre towards a unit cell A) 100%. B) 50%. C) 25%. D) 0. Show Answer Correct Answer: A) 100%. 23. Select the correct statement ( s ) A) The non-stoichiometric form of NaCl is yellow and that of KCl is blue-lilac. B) Solids containing F-centers ( Farbe ) are paramagnetic. C) Conduction by electrons IS called n-type semi conduction. D) All of the above. Show Answer Correct Answer: D) All of the above. 24. The edge length of fee cell is 508 pm. If radius of cation is 110 pm, the radius of anion is A) 110 pm. B) 220 pm. C) 285 pm. D) 144 pm. Show Answer Correct Answer: D) 144 pm. 25. A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is: A) 144 pm. B) 200 pm. C) 288 pm. D) 408 pm. Show Answer Correct Answer: C) 288 pm. ← 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 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 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