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A metal crystallizes into two cubic phas...

A metal crystallizes into two cubic phases, face-centred cubic and body-centred cubic, which have unit cell lengths `3.5` and `3.0 A`, respectively. Calculate the ration of densities of fcc and bcc.

A

`3.12`

B

`2.04`

C

`1.26`

D

`0.72`

Text Solution

Verified by Experts

The correct Answer is:
3
`d=(ZM)/(a^(3)N_(A))" "(d_(1))/(d_(2))=(4)/((3.5)^(3))xx((3)^(3))/(2)=1.26`
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