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NEET 2009
Exam
NEET
Year
2009
Subject
Chemistry
Chapter
Solid State

NEET 2009 · Chemistry · Solid State

Sodium has body centred packing. Distance between two nearest atoms...

Sodium has body centred packing. Distance between two nearest atoms is 3.7A˚3.7 Å. The lattice parameter is :

Options

  1. A8.6A˚8.6 Å
  2. B6.8A˚6.8 Å
  3. C4.3A˚4.3 Å
  4. D3.0A˚3.0 Å

Correct answer

C. 4.3A˚4.3 Å

Step-by-step solution

3a2=3.7A˚⇒a=2×3.73=4.3A˚\begin{aligned}\frac{\sqrt{3} \mathbf{a}}{2}& =3.7 Å \\ \Rightarrow \quad \mathbf{a} & =\frac{2 \times 3.7}{\sqrt{3}}=4.3 Å \end{aligned}
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