question_answer 73)

      In which pair most efficient packing is present?                                (a) hcp and bcc                  (b) hcp and ccp                             (c) bcc and ccp                   (d) bcc and simple                                                   cubic cell           

Answer:

                                                                      (b) Packing efficiency is the percentage of total filled space by particles and it can be calculated as packing efficiency                                                            Since, packing efficiency for hcp or ccp is calculated to be 74% which is maximum among all type of crystals.