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 is (assuming molar mass and atomic radii of iron remains cons

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Iron exhibits BCC structure at room temperature. Above 900 &#176; C , it transforms to FCC structure. The ratio of the density of iron at room temperature to that at 900 &#176; C is (assuming molar mass and atomic radii of iron remains constant with temperature)

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Correct answer: A. 3 3 4 2

BCC = 4 r = 3 a &#8658; a = 4 r 3 FCC = 4 r = 2 a &#8658; a = 4 r 2 d BCC d FCC = Z BCC &#215; M N A &#160; a 3 Z FCC &#215; M N A &#160; a 3 = 2 &#215; M N A 4 r 3 3 4 &#215; M N A &#215; 4 r 2 3 = 3 4 3 2 &#160; .

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 is (assuming molar mass and atomic radii of iron remains constant with temperature)

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Iron exhibits BCC structure at room temperature. Above 900 &#176; C , it transforms to FCC structure. The ratio of the density of iron at room temperature to that at 900 &#176; C is (assuming molar mass and atomic radii of iron remains constant with temperature)

Options

Correct answer

Step-by-step solution

More from Solid State

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 is (assuming molar mass and atomic radii of iron remains constant with temperature)