Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

The Solid State

Short Answer Type

41. Define non-stiochiometry defect in crystals?

196 Views

42. What is the arrangement of Zn²⁺ and S^2– ions in Zinc blende (ZnS) crystal structure?

326 Views

43. explain the effect of Frenkel structural defect on the electrical conductance of a crystalline solid?

163 Views

44. An ionic compound AB₂ possess CaF₂type crystal structure. What the co-ordination number of A²⁺ and B^– ions in crystal of AB₂ explain.

705 Views

45. What kind point defect lowers the density of a crystal?

167 Views

46. What do you mean by ‘point defects' in crystals?

216 Views

47. Define dislocation in crystals.

191 Views

48. Explain the term ‘dislocations’ in relation to crystals?

150 Views

49. Why does zinc oxide exhibit enhanced electrical conductivity on heating?

On heating, zinc oxide loses oxygen

The excess zinc ions are accomodated in interstitial sites with electrons trapped in the neighbourhood. The enhanced conductivity is due to these trapped electrons.

432 Views

50. In a body centred unit cell, one of the diagonals contains two extra atoms. Find the number of atoms present per unit cell?

129 Views