NEET Chemistry The Solid State Questions Solved

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An element with molar mass 27 g mol-1 forms a cubic unit cell with edge length
4.05 × 10-8 cm. If its density is 2.7 g cm-3, what is the nature of the cubic unit cell ?   (3 marks)

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Concept Questions :-

Density/Formula/packing fraction/ Semiconductors

           d=z x Ma3NAZ= d a3 NAM                                                      12 marks     

 z=2.7 g cm-3×6.022×1023 mol-1×(4.05×10-8 cm)327 g mol-1                        (1 marks)

=3.999 4                                                                     12 marks   

Face centred cubic cell/fcc                                                                              (1 marks)

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