Iron exhibits bcc structure at room temperature . Above 900^@C , it transforms to fcc structure. The ratio of the density of iron at room temperature to that at 900^@C(assuming molar mass and atomic radii of iron remain constant with temperature ) is

Iron exhibits bcc structure at room temperature . Above 900^@C , it tr

1.	Iron exhibits bcc structure at room temperature . Above 900^@C , it transforms to fcc structure. The ratio of the density of iron at room temperature to that at 900^@C(assuming molar mass and atomic radii of iron remain constant with temperature ) is
Answer» `sqrt3/sqrt2` `(4sqrt3)/(3sqrt2)` `(3sqrt3)/(4sqrt2)` `1/2` Solution :Density `(RHO)=(ZxxM)/(a^3xxN_0)` As M and a REMAIN contant and `N_0` is ALSO CONSTANT , `rho prop Z` `rho_"bcc"/rho_"FCC"=Z_"bcc"/Z_"fcc"=2/4=1/2`