12th Class Chemistry Sample Paper Chemistry Sample Test Paper-1

  • question_answer
      (a) What is meant by 'Point defects' in crystal?                                                                                                                   1 (b) Define dislocation in crystal.                                                                                                                                                 1

    Answer:

                      (a) Point defects: Defect caused by missing or misplaced ions or atoms in the crystal lattice are known as point                 defects in the crystal.                                                                                                                                                                     1 (b) When a crystal point is missing from its normal lattice position but occupies position in interstitials is known as dislocation in crystal.                                                                                                                                                      1


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