Chemistry - Solid State Question with Solution | TestHub

ChemistrySolid StateMiscellaneous/MixedEasy2 minPYQ_2020
ChemistryEasysingle choice

The Cr metal (atomic weight 52) crystallises BCC structure. The unit cell edge length is 2.88Å. The density of Cr is 7.2 gml-1. The number of atom is 52 g of Cr is

Options:

Answer:
C
Solution:

V unit cell = a 3
W unit cell  = a 3 ×d
= 2.88× 10 −8 3 ×7.2 g
no. of unit cell in  S 2 g Cr = 52 2.88× 10 −8 3 ×7.2
In BCC unit cell has z = 2
total no. of atoms =  52×2 2.88× 10 −8 3 ×7.2 =6× 10 23

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Solid StateSubtopic:Miscellaneous/Mixed
⏱ 2mℹ️ Source: PYQ_2020

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