# NEET Chemistry The Solid State Questions Solved

A metallic element exists as cubic lattice. Each edge of the unit cell is 2.88 $\stackrel{0}{A}$. The density of the metal is 7.20 g $c{m}^{-3}$. How many unit cell will be present in 100 g of the metal -

(A) $6.85×{10}^{2}$

(B) $5.82×{10}^{23}$

(C) $4.37×{10}^{5}$

(D) $2.12×{10}^{6}$

(B).  The volume of the unit cell

$={\left(2.88\stackrel{0}{A}\right)}^{3}=23.9×{10}^{-24}c{m}^{3}$

The volume of 100 g of the metal =

Number of unit cells in this volume

Difficulty Level:

• 8%
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