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A metal crystallises into two cubic phas...

A metal crystallises into two cubic phases , face centred cubic (fcc) and body centred cubic (bcc) , whose unit cell lengths are 3.5 Å and 3.0 Å , respectively. The ratio of densities of fcc and bcc is

A

3.12

B

2.04

C

1.26

D

0.72

Text Solution

Verified by Experts

The correct Answer is:
C
`d = (ZM)/(a^(3)N_(A)) (d_(1))/(d_(2)) = (4)/((3.5)^(3)) xx ((3)^(3))/(2) = 1.26`
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RESONANCE ENGLISH-SOLID STATE-Part- IV
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