NEET2008ChemistrySolid StateActual
If 'a' stands for the edge length of the cubic systems : simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively
Options
- A1 a: 3 a: 2 a
- B1 2 a: 3 4 a: 1 2 2 ^a
- C1 2 a: 3 a: 1 2 a
- D1 2 a : 3 2 a : 2 2 a
Correct answer
B. 1 2 a: 3 4 a: 1 2 2 ^a
Step-by-step solution
For simple cube, a=2 r or r= a 2 For BCC, 4 r= 3 a or r= 3 4 a For FCC, 4 r= 2 a or r= a 2 2 Thus, the ratio is 1 2 a: 3 4 a: 1 2 2 a