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CBSE Class 12 Chemistry Test – Solid State

MM : 25 TIME : 40 MIN.
1. Give an example of ionic compound which show Frenkel defect.
2. What type of semiconductor is obtained when silicon is doped with Arsenic?
3. How do metallic and ionic substances differ in conducting electricity ?
4. How are the following properties of the crystals affected by Schottky and Frenkel defects
(i) Density (ii) Electrical Conductivity
5. What is the number of atom in a unit cell of
(i) face centered cubic structure
(ii) body centered cubic structure
6. What are F – centers ? Why are solids containing F – centers paramagnetic?
7. Account for the following :
(i) Fe3O4 is a ferromagnetic at room temperature but becomes paramagnetic at 850 K.
(ii) Zinc oxide on heating becomes yellow.
(iii) Frenkel defect does not change the density of AgCl crystal .
8. Chromium metal crystallizes in a body centered cubic lattice . The length of the unit cell edge is found to be 287 pm . Calculate the atomic radius of chromium
9. The density of Cu metal is 8.95 g cm-3. If the radius of Cu atom is 127.8 pm . Is the copper unit cell a simple cubic , a body centered or a face centered cubic structure ?
10. A cubic solid is made of two elements X and Y . Atoms Y are at corner of the cube and X at body centre . What is the formula of the compound ?
11. Calculate the distance between Na+ and Cl- ion in NaCl crystal if its density is 2.165 g cm-3 (Molar mass on NaCl = 58.5 g mol-1 )

 

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CBSE Chemistry Question Bank for Class 12 – The Solid State

CBSE Chemistry Question Bank for Class 12

The solid State

Very Short Answer type Questions

  1. Why are solids rigid?
  2. Name two types in which solids are broadly classified.
  3. Give one example each for a crystalline and amorphous solid.
  4. How many atoms per unit cell are present in (i) hcp (ii) fcc (iii) bcc
  5. How many tetrahedral holes are present per unit cell in an (1)hcp structure and (2) fcc structure?
  6. What type of coordination would you expect when (1)all the tetrahedral holes in an fcc structure of  anions are occupied by cations, (2) half of the tetrahedral holes in an fcc structure of anions are occupied by cations and (3) all the octahedral holes of an fcc structure

 

Be the first to comment - What do you think?  Posted by admin - February 18, 2013 at 4:10 pm

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