See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

No. of C-atoms in one unit cell 1 1 6 8 4 8 2 8       Density 3 A 8 12 N a    (a = 400 Pm = 400 × 10–12 m = 4 × 10–8 cm)   3 23 8 3 8 12 6 10 4 10 960 160