This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 1 Solid State – Quiz 52 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 52 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Repeatable entity of a crystal structure is known as A) Crystal. B) Lattice. C) Unit cell. D) Miller indices. Show Answer Correct Answer: C) Unit cell. 2. 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. 3. 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) Insulators. B) Semiconductor. C) Metals. D) Other. Show Answer Correct Answer: C) Metals. 4. 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) 6.08X10$^{23}$. B) 6.02X10$^{23}$. C) 6.01X10$^{23}$3. D) 6.04X10$^{23}$. Show Answer Correct Answer: D) 6.04X10$^{23}$. 5. ..... % of ..... is used as an antifreeze in cars for cooling engine A) 35, ethyl glycol. B) 40, ethyl glycol. C) 25, elthylene. D) 35, ethylene glycol. Show Answer Correct Answer: D) 35, ethylene glycol. 6. Both diamond and rhombic sulfur are covalent solids but the latter has a very low melting point than the former. Explain why? A) Because diamond is a crystal. B) Because diamond has strong interatomic forces. C) Because diamond is an allotrope of carbon. D) Because diamond cannot be broken. Show Answer Correct Answer: B) Because diamond has strong interatomic forces. 7. An element (atomic mass = 27) has a density of 2.7 g cm$^{-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. 8. Coordination number for closest packed crystal structure A) 16. B) 12. C) 8. D) 4. Show Answer Correct Answer: B) 12. 9. Compound that can exhibit Frenkel as well as Schottky defect is A) AgCl. B) AgBr. C) NaCl. D) ZnS. Show Answer Correct Answer: B) AgBr. 10. Constituent particle present in corners and body center A) SC. B) BCC. C) FCC. D) ECC. Show Answer Correct Answer: B) BCC. 11. Which set of miller indices gives x-ray intensity in bcc A) (220), (222), (321). B) (220), (311), (222). C) (200), (111), (311). D) (400), (111), (200). Show Answer Correct Answer: A) (220), (222), (321). 12. At room temperature Fe$_{3}$O$_{4}$ is A) Paramagnetic. B) Diamagnetic. C) Ferromagnetic. D) Ferrimagnetic. Show Answer Correct Answer: D) Ferrimagnetic. 13. 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$_{4}$B$_{3}$. C) A$_{3}$B. D) COMPOSITION CAN NOT BE SPECIFIED. Show Answer Correct Answer: A) AB$_{3}$. 14. How many atoms can be assigned to its unit cell if an element forms a face-centered cubic cell? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: D) 4. 15. 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. 16. The main disadvantage of Ward leonard control is A) Wide range of speed control. B) High initial cost. C) Smooth armature current. D) Less noise. Show Answer Correct Answer: B) High initial cost. 17. To get an n-type of semiconductor, germanium should be doped with A) Gallium. B) Arsenic. C) Aluminium. D) Boron. Show Answer Correct Answer: B) Arsenic. 18. 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) 5.08%. B) 7.01%. C) 4.08%. D) 6.05%. Show Answer Correct Answer: C) 4.08%. 19. 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) A$_{2}$B$_{3}$O$_{4}$. B) AB$_{2}$O$_{2}$. C) ABO$_{2}$. D) A$_{2}$BO$_{2}$. Show Answer Correct Answer: B) AB$_{2}$O$_{2}$. 20. 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. 21. Is the most common crystal system for metals A) Tetragonal. B) Trigonal. C) Monoclinic. D) Cubic. Show Answer Correct Answer: D) Cubic. 22. In a FCC cell, an atom at the face contributes to the unit cell: A) 1/4 part. B) 1/2 part. C) 1/8 part. D) 1 part. Show Answer Correct Answer: B) 1/2 part. 23. 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. 24. Choose correct answer for a diamond cubic (DC) Structure: A) This is a closed packed structure. B) This is a fcc structure with one atom basic. C) It has second nearest neighbor distance $\frac{a}{\sqrt{2}}$. D) It's coordination number is 8. Show Answer Correct Answer: C) It has second nearest neighbor distance $\frac{a}{\sqrt{2}}$. 25. What is the primary reason for the low conductivity of ionic compounds? A) High melting points. B) Lack of mobile ions. C) Strong covalent bonds. D) Presence of free electrons. Show Answer Correct Answer: B) Lack of mobile ions. ← 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 8Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 9Class 12 Chemistry (Part I) Chapter 1 Solid State Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books