The Solid State part-2
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NCERT Class 12 Chemistry Chapter-wise Solutions
- 1 – The Solid State
- 2 – Solutions
- 3 – Electrochemistry
- 4 – Chemical Kinetics
- 5 – Surface Chemistry
- 6 – General Principles and Processes of Isolation of Elements
- 7 – The p-Block Elements
- 8 – The d-and f-Blocks Elements
- 9 – Coordination Compounds
- 10 – Haloalkanes and Haloarenes
- 11 – Alcohols, Phenols and Ethers
- 12 – Aldehydes, Ketones and Carboxylic Acids
- 13 – Amines
- 14 – Biomolecules
- 15 – Polymers
- 16 – Chemistry in Everyday Life
CHAPTER ONE THE SOLID STATE
- 1.1 General Characteristics of Solid State
- 1.2 Amorphous and Crystalline Solids
- 1.3 Classification of Crystalline Solids
- 1.4 Crystal Lattices and Unit Cells
- 1.5 Number of Atoms in a Unit Cell
- 1.6 Close-Packed Structure
- 1.7 Packing Efficiency
- 1.8 Calculations Involving Unit Cell Dimensions
- 1.9 Imperfections in Solids
- 1.10 Electrical Properties
- 1.11 Magnetic Properties
NCERT Solutions class 12 Chemistry The Solid State part 2
14. If the radius of the octahedral void is r and radius of the atoms in close packing is R, derive relation between r and R.
15. Copper crystallises into a fcc lattice with edge length 
. Show that the calculated density is in agreement with its measured value of 8.92 g 
.
16. Analysis shows that nickel oxide has the formula 0.98O1.00. What fractions of nickel exist as 
and 
ions?
17. What is a semiconductor? Describe the two main types of semiconductors and contrast their conduction mechanism.
18. Non-stoichiometric cuprous oxide, 
can be prepared in laboratory. In this oxide, copper to oxygen ratio is slightly less than 2:1. Can you account for the fact that this substance is a p-type semiconductor
19. Ferric oxide crystallises in a hexagonal close-packed array of oxide ions with two out of every three octahedral holes occupied by ferric ions. Derive the formula of the ferric oxide.
20. Classify each of the following as being either a p-type or an n-type semiconductor:
(i) Ge doped with In
(ii) B doped with Si.
21. Gold (atomic radius = 0.144 nm) crystallises in a face-centred unit cell. What is the length of a side of the cell?
22. In terms of band theory, what is the difference
(i) Between a conductor and an insulator
(ii) Between a conductor and a semiconductor
23. Explain the following terms with suitable examples:
(i) Schottky defect
(ii) Frenkel defect
(iii) Interstitials and
(iv) F-centres
24. Aluminium crystallises in a cubic close-packed structure. Its metallic radius is 125 pm.
(i) What is the length of the side of the unit cell?
(ii) How many unit cells are there in 1.00 of aluminium?
25. If NaCl is doped with 
of
, what is the concentration of cation vacancies?
26. Explain the following with suitable examples:
(i) Ferromagnetism
(ii) Paramagnetism
(iii) Ferrimagnetism
(iv) Antiferromagnetism
(v) 12-16 and 13-15 group compounds.
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covers both organic and inorganic chemistry. Please note that CBSE has reduced the syllabus for class 12 Chemistry. So, you must check the latest syllabus of CBSE while going through the NCERT solution of any chapter given in the class 12 NCERT book.