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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Solid State

NTA Abhyas 2020 · Chemistry · Solid State

Strontium crystallizes in a fcc unit cell with edge length a. It...

Strontium crystallizes in a fcc unit cell with edge length a.\text{a}\text{.} It contains \text{0}\text{.2%} Frenkel defect and another crystal of Sr\text{Sr} contains \text{0}\text{.1%} Schottky defect. Density of solid with Frankel defect = df{d}_{f} and density with Schottky defect = ds,{d}_{s} , then

Options

  1. Adf=ds{d}_{f} = {d}_{s}
  2. Bdf>ds{d}_{f} > {d}_{s}
  3. Cdf<ds{d}_{f} < {d}_{s}
  4. Ddf=2ds{d}_{f} = 2{d}_{s}

Correct answer

B. df>ds{d}_{f} > {d}_{s}

Step-by-step solution

No effect on density due to Frenkel defect but due to Schottky defect density of solid decrease
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