Teaching Haryana (HPSC) Assistant Professor Mock Test 2025 Physical Sciences Condensed Matter Physics
Potassium chloride forms an FCC lattice, in which K and Cl occupy alternating sites. The density of KCl is 1.98 g / cm3 and the atomic weights of K and Cl are 39.1 and 35.5, respectively. The angles of incidence (in degrees) for which Bragg peaks will appear when X-ray of wavelength 0.4 nm is shone on a KCl crystal are
1
18.5, 39.4 and 72.2
2
19.5 and 41.9
3
12.5, 25.7, 40.5 and 60.0
4
13.5, 27.8, 44.5 and 69.0
5
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