Q32 · CSIR NET Chemistry, December 2015
Paper: CSIR NET December 2015 · Subject: Physical Chemistry · Chapter: Solid State Chemistry · Topic: Crystal Systems Lattices · Marks: 2 · Difficulty: Medium
For a simple cubic crystal lattice, the angle between the [201] plane and the xy plane is
(a)less than 30°
(b)between 30° and 45°
(c)between $45^{\circ}$ and $60^{\circ}$
(d)greater than $60^{\circ}$
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
The angle between planes equals the angle between their normals: cos θ = (2,0,1)·(0,0,1)/√5 = 0.447, θ ≈ 63° (d).
Study loop for Solid State Chemistry