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Engineering
107 Views   |  

Which of the following arrangements shows the schematic alignment of magnetic moments of antiferromagnetic substance?

  • Option 1)

  • Option 2)

  • Option 3)

  • Option 4)

 

As we learned

The substances which are expected to passes para-magnetism or ferromagnetism on the basis of unpaired electrons but actually, they possess zero net magnetic moments are called anti ferromagnetic substance.


Option 1)

Option 2)

Option 3)

Option 4)

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Engineering
78 Views   |  

Which type of ‘defect’ has the presence of cations in the interstitial sites ?

  • Option 1)

    Metal deficiency defect

  • Option 2)

    Schottky defect

  • Option 3)

    Vacancy defect

  • Option 4)

    Frenkel defect

 

As we learned  @ ________

In frenkel defect cations occupy interstitial positions due to their small size.

 

 


Option 1)

Metal deficiency defect

Option 2)

Schottky defect

Option 3)

Vacancy defect

Option 4)

Frenkel defect

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Engineering
420 Views   |  

All of the following share the same crystal structure excepts.

  • Option 1)

    LiCl

  • Option 2)

    NaCl
     

  • Option 3)

    RbCl

     

  • Option 4)

    CsCl

 
As we learned No. of atoms(z) for face centered unit cell - Lattice points: at corners and face centers of unit cell. For face centered cubic (FCC), z=4. - wherein       structure of CsCl is different from LiCl, NaCl, Rbcl. Option 1) LiCl Option 2) NaCl   Option 3) RbCl   Option 4) CsCl
Engineering
293 Views   |  

Assuming ideal gas behaviour, the ratio of density of ammonia to that of hydrogen
chloride at same temperature and pressure is : (Atomic wt. of Cl=35.5 u)

  • Option 1)

    1.46

  • Option 2)

    0.46

  • Option 3)

    1.64

  • Option 4)

    0.64

 

d= \frac{p(molecular wt )}{RT}

d= \frac{p(NH_{3} )}{HCL}= \frac{molecular wt NH_{3}}{molecular wt HCL}=\frac{17}{36.5}=0.46


Option 1)

1.46

This is incorrect

Option 2)

0.46

This is correct

Option 3)

1.64

This is incorrect

Option 4)

0.64

This is incorrect

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