# NEET Chemistry The Solid State Questions Solved

Diamond has face-centred cubic lattice. There are two atoms at (0,0,0) and $\left(\frac{1}{4},\frac{1}{4},\frac{1}{4}\right)$coordinates.The ratioof the carbon-carbon bond distance to the edge of the unit cell is

(1) $\sqrt{\frac{3}{16}}$

(2) 4

(3) $\frac{1}{4}$

(4) $\frac{1}{\sqrt{2}}$

(1) dc-c = $\sqrt{\frac{1}{16}\text{\hspace{0.17em}}+\text{\hspace{0.17em}}\frac{1}{16}\text{\hspace{0.17em}}+\text{\hspace{0.17em}}\frac{1}{16}}\text{\hspace{0.17em}}=\text{\hspace{0.17em}}\sqrt{\frac{3}{16}}$ and aFCC = 1

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