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Chemistry - Solid State

Practise 27 COMEDK previous year questions on Solid State, compiled from papers spanning 2012 to 2023. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty COMEDK tests.

Solid State has been asked in 11 of the 15 years of COMEDK papers analysed (2012–2026), with 27 questions in all. 59% of them were easy, 37% moderate and 4% tough. Most of its questions came from 2023, with 6 questions that year.

The chapter's 7 topics are not weighted equally: Cubic system (16 questions, 59%), Stoichiometric defects (4 questions, 15%), and Electrical and Magnetic properties (2 questions, 7%) have been asked the most. Cubic system has also led over the last five years, with 4 questions. Stoichiometric defects has produced the most tough questions (1).

  1. 1Which defect leads to decrease in the density of crystal?2023 (Memory Based)Stoichiometric defects
  2. 2In a normal spinel type structure, the oxide ions are arranged in ccp, whereas tetrahedral holes are occupied by ions and of octahedral hole2023 (Memory Based)Ionic structure
  3. 3has face centred structure with edge length equal to . The radius is2023 (Memory Based)Cubic system
  4. 4Copper has face centred structure with edge length equal to . The radius is2023 (Morning Shift)Cubic system
  5. 5In a normal spinel type structure, the oxide ions are arranged in ccp, whereas tetrahedral holes are occupied by ions and of octahedral hole2023 (Morning Shift)Cubic system
  6. 6Which defect leads to decrease in the density of crystal?2023 (Morning Shift)Stoichiometric defects
  7. 7Doping of silicon (Si) with indium (In) leads to the formation of2022Electrical and Magnetic properties
  8. 8Which of the following show both Frenkel and Schottky defect?2022Stoichiometric defects
  9. 9How many atoms are present in hcp per unit cell?2022Cubic system
  10. 10Sodium metal crystallises in a body centred cubic lattice with a unit cell edge of . The radius of sodium atom is2021Cubic system
  11. 11How much part of any corner atom actually belongs to a particular unit cell?2021Cubic system
  12. 12The vacant space in bec lattice cell is2021Cubic system
  13. 13The coordination number of sodium chloride is2019Cubic system
  14. 14Which of the following does not conduct electricity?2018Electrical and Magnetic properties
  15. 15The radii of and ions are 95 pin and 181 pm respectively. The edge length of unit cell is2018Crystal Structure of Solids
  16. 16A compound is formed by elements and . This crystallises in the cubic structure, where the atoms are at the corners of the cube and atoms ar2017Cubic system
  17. 17Malleability and ductility of metals can be accounted due to2017Properties and Types of Solids
  18. 18An ionic compound is expected to have tetrahedral structure if lies in the range of2017Cubic system
  19. 19Which of the following statements about amorphous solids is incorrect?2016Properties and Types of Solids
  20. 20If the distance between and ions in sodium chloride crystal is , the length of the edge of the unit cell is2016Cubic system
  21. 21If same type of atoms are packed in hexagonal close packing and cubic close packing separately, then2015Cubic system
  22. 22Schottky defect in crystals is observed when2014Stoichiometric defects
  23. 23A crystalline solid has ions at the corners and face centres, whereas ions are at the body centre and edge centres of the unit cell. The sim2014Cubic system
  24. 2485 . The radius of an atom is . If it crystallises in a face-centered cubic lattice, the length of the edge of the unit cell is2014Cubic system
  25. 25The flame colours of metal ions are due to2013Non-stoichiometric defects
  26. 26The ratio of cationic radius to anionic radius in an ionic crystal is greater than . Its coordination number is2013Cubic system
  27. 27Two ions and have radii 104 and 200 pm respectively, in a cubic close packed crystal of compound . The coordination number of is2012Cubic system

Frequently Asked Questions

1.How many questions are available for Solid State?

This chapter includes 27 questions compiled from COMEDK papers spanning 2012 to 2023.

2.Are these questions only from COMEDK, or from other exams too?

These are COMEDK questions specifically for the Solid State chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Solid State an important chapter for COMEDK Chemistry?

Solid State has appeared in 11 of the 15 years of COMEDK papers covered here, with 27 questions across 12 papers - about 2 per paper it appears in.

4.What is the difficulty level of Solid State questions in COMEDK?

Of the 27 questions analysed for this chapter, 59% are easy, 37% moderate and 4% tough. 2023 had the most, with 6 questions.

5.Which topics in Solid State should I focus on?

These topics have carried the most weightage in Solid State:

  • Cubic system - 16 questions (59%)
  • Stoichiometric defects - 4 questions (15%)
  • Electrical and Magnetic properties - 2 questions (7%)
  • Stoichiometric defects has produced the most tough questions (1).