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  • (i)     (a)    Following is the schematic alignment of magnetic moments :                  <img alt="" src="https://c

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

                 

                    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 \times 10 ^{-8} cm. Calculate the atomic mass of the element. (N_A = 6.02 \times 10^{23} mol ^{-1} )

 

 

 

 
 
 
 
 

Answers (1)

(i)    (a)    Antiferromagnetism is shown by this substance

        (b)    (i)    KCl - Schottky Effect

                (ii)    AgCl - Frenkel Effect

(ii)    Edge = 4\times 10^{-8} \text{ cm}

        Volume = (4\times 10^{-8})^3 \text{ cm}^3

        Density = 11.2g/cm^3

        M = ?

            d = \frac{Z\times M }{z\times N_A}

        In fcc, z = 4

        M = \frac{11.2\times (4\times 10^{-8})^3\times 6.02\times 10^{23}}{4}

                = 1078.78 \times 10^{-1}

                = 107.878g/mol

Posted by

Sumit Saini

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