InterviewSolution
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InterviewSolution
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The pyknometric density of `NaCl` crystal is `2.165 xx 10^(3 kg m^(-3)` while its `X`-ray density is `2.178 xx 10^(-3) kg m^(-3)`. The fraction of unoccupied sites in `NaCl` crystal is a. `5.96` b. `5.96 xx 10^(-2)` c. `5.96 xx 10^(-1)` d. `5.96 xx 10^(-3)`A. `5.96 xx 10^(-1)`B. `5.96`C. `5.96 xx 10^(-2)`D. `5.96 xx 10^(-3)` |
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Answer» Correct Answer - d Difference `= 2.178 xx 10^(3) - 2.165 xx 10^(3) = 0.013 xx 10^(3)` Fraction unoccupied `= (0.013 xx 10^(3))/(2.173 xx 10^(3)) = 5.96 xx 10^(-3)` |
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