1.

A metal crystallizes in 2 cubic phases fcc and bee whose unit cell lengths are 3.5 Å and 3.0Å respectively. The ratio of their densities is

Answer»

0.72
2.04
1.26
3.12

Solution :`(d_(1))/(d_(2))=((a_(2))^(3))/((a_(1))^(3))xx(z_(1))/(z_(2))=((3)/(3.5))^(3)xx(4)/(2)=1.26`


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