NEET Chemistry The Solid State Questions Solved

BOARD

(i) (a) Following is the schematic alignment of magnetic moments :    (5 marks)

What type of magnetism is shown by this substance ?

(b) What type of stoichiometric defect is shown by (i) KCl (ii) AgCl ?

(ii) An element with density 11.2 g cm–3 forms a fcc lattice with edge

length of 4 10–8 cm. Calculate the atomic mass of the element.

(NA = 6.02 1023 mol–1)

Concept Videos :-

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#21 | Packing Fraction of HP Unit Cell
#24 | Density of Unit Cell

Concept Questions :-

Density/Formula/packing fraction/ Semiconductors

(i) a) Antiferromagnetism                                                (1 mark)

(b) i) Schottky defect          ii) Frenkel Defect                    (1/2 +1/2 marks)

(ii) d=zMa3Na                                                                   (1/2 mark)

       z=4                                                                        (1/2 mark)

      11.2=4×M(4×10-8)3×(6.02×1023)                                      (1/2 mark)

      M=107.9 g/mol                                                         (1 mark)

     Atomic mass= 107.9 u                                                (1/2 mark)

Difficulty Level:

  • 45%
  • 50%
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