Most important question on chapter 1 solid state for pseb board
1. Write two different between covalent and metallic solids.
2. Give two difference between ionic solid and covalent solids.
3. Give four differences between crystalline and amorphous solids.
4. Define the following terms:
a) Ferromagnetism b) ferrimagnetism.
5. Write two differences between schottky defect and Frankel defect.
6. A solid AB has the NaCl structure. If the radius of the cation A is 100 pm what is the radius of the anion B?
7. A compound is formed by two elements M and N. The elements N Forms CCP and M atom accupy 1/3 of the tetrahedral voids what is the formula of the compound ?
8. A cubic unit cell is made up of X and Y elements. If X are present on the corner of the cube and Y are present on center of faces of cube, then find the formula of the compound.
9. In a metallic oxide the oxide ion are in CCP arrangement 1/6th of tetrahedral voids are occupied by cations P and 1/3rd of octahedral voids are occupied by cations Q. Deduce the formula of the compound.
10. The two ions A+ and B- have radii 80 pm and 200 pm respectively. In the close packed crystal of compound AB predict the coordination number of A+.
11. An element occur in BCC structure with cell edge of 280 pm. find the density of the element if it's atomic mass is 51.7.
12. An element having BCC geometry has atomic mass 50 g/mole. Calculate the density of the unit cell if its edge lenght is 290pm.
13. An element having a density 11.2 g/cm³ forms a fcc lattice with edges length of 4 × 10-⁸ cm. calculate the atomic mass of the element.
14. Copper crystallizes in a face centered cubic lattice. Calculate the number of unit cell in 12 gram of copper.
