Solid State Quiz 5

Question 1

The mass of a unit cell of a body centred cubic crystal of a metal is $72 .2 \times 10 ^{23}g.$The atomic mass of the metal is :

Accepted Answer

$217.3 \ gmol^{-1}$

Answer

$128.6 \ gmol^{-1}$

Answer

$108.7 \ gmol^{-1}$

Answer

$57.86 \ gmol^{-1}$

Question 2

An element crystallises in fcc structure. If the atomic mass of the element is 72.7 u, the mass of unit cell of it will be..

Accepted Answer

$4.83 \times 10 ^{-25} kg$

Answer

$2.9 \times 10 ^{-24} g$

Answer

$1.2 \times 10 ^{-22} g$

Answer

$2.41 \times 10 ^{-24} kg$

Question 3

Edge length of a cubic unit cell is 354 pm. The distance between two atoms diagonally opposite on the face is

Accepted Answer

500 pm

Answer

354 pm

Answer

708 pm

Answer

627 pm

Question 4

The unit cell has an edge length 403 pm. The distance between two atoms placed opposite ends of body diagonal will be

Accepted Answer

698 pm

Answer

806 pm

Answer

201.5 pm

Answer

578 pm

Question 5

An element having atomic mass 115 u, crystallises in bcc structure. The number of unit cells in 1 g of the element will be

Accepted Answer

$2.6 \times 10 ^{21}$

Answer

$3.8 \times 10 ^{23}$

Answer

$8.7 \times 10 ^{-3}$

Answer

$6.17 \times 10 ^{20}$

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