Q104 · CSIR NET Chemistry, December 2012
Paper: CSIR NET December 2012 · Subject: Physical Chemistry · Chapter: Solid State Chemistry · Topic: Crystal Systems Lattices · Marks: 2 · Difficulty: Medium
A metal crystallizes in fcc structure with a unit cell side of 500 pm . If the density of the crystal is 1.33 g/cc, the molar mass of the metal is close to
(a)23
(b)24
(c)25
(d)26
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
M = ρN_Aa³/Z = 1.33 × 6.022×10²³ × (5×10⁻⁸)³/4 = 100/4 = 25 g mol⁻¹.
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