NEET Chemistry The Solid State Questions Solved

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Silver metal crystallises with a face centred cubic lattice.  (5 marks)

The length of the unit cell is found to be 3.0 10–8 cm. 

Calculate atomic radius and density of silver.

(Molar mass of Ag = 108 g mol–1, NA = 6.02   x 1023 mol–1).

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Concept Questions :-

Density/Formula/packing fraction/ Semiconductors

r=a22                                                             (1/2 mark)

=3.0×10-82×1.414                                                        (1/2 mark)

=1.06 × 10-8 cm                                                (1 mark)

 

                 d=zMa3Na                                            (1/2 mark)

                z=4                                                    (1/2 mark)

                d=4×108(3×10-8)3×(6.02×1023)                     (1 mark)

                =26.6 g/cm3                                                (1 mark)

Difficulty Level:

  • 85%
  • 16%
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