Aluminium metal has a density of `2.72 g cm^(-3)` and crystallizes in a cubic lattice with an edge of `404` pm. Which is//are correct?A. It forms an fcc unit cell.B. It forms a bcc unit cell.C. Its coordination number is `8`.D. Its coordination number is `12`.

Aluminium metal has a density of `2.72 g cm^(-3)` and crystallizes in

1.	Aluminium metal has a density of `2.72 g cm^(-3)` and crystallizes in a cubic lattice with an edge of `404` pm. Which is//are correct?A. It forms an fcc unit cell.B. It forms a bcc unit cell.C. Its coordination number is `8`.D. Its coordination number is `12`.
Answer» Correct Answer - A::D Use any relation: `rho=(Z_(eff)xxAw)/(N_(A)xxa^(3))` or `rho=(Z_(eff)xxAwxx1.67xx10^(-24)g)/(a^(3))` `:. 2.72 g cm^(-3) = (Z_(eff)xxAwxx1.67xx10^(-24)g)/((404xx10^(-10))^(3)cm^(3))` `:. Z_(eff) approx = 4` `a. Z_(eff) = 4`, means fcc structure. d. `CN` of fcc structure `= 12`

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Aluminium metal has a density of `2.72 g cm^(-3)` and crystallizes in a cubic lattice with an edge of `404 pm`. Which of the following is correct?A. It forms bcc unit cellB. It forms fcc unit cellC. Its `CN = 8`D. Its `CN` is `6`

Aluminium metal has a density of `2.72 g cm^(-3)` and crystallizes in a cubic lattice with an edge of `404` pm. Which is//are correct?A. It forms an fcc unit cell.B. It forms a bcc unit cell.C. Its coordination number is `8`.D. Its coordination number is `12`.

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