<p>12. Which of the following is the correct order of boiling points for KNO₃, CH₃OH, C₂H₆, Ne? (A) Ne &lt; CH₃OH &lt; C₂H₆ &lt; KNO₃ (B) KNO₃ &lt; CH₃OH &lt; C₂H₆ &lt; Ne (C) Ne &lt; C₂H₆ &lt; KNO₃ &lt; CH₃OH (D) Ne &lt; C₂H₆ &lt; CH₃OH &lt; KNO₃ (E) C₂H₆ &lt; Ne &lt; CH₃OH &lt; KNO₃</p>

13. Which of the following statements is (are) false?I. The layering in a hexagonal closest-packed structure is aba.II. A body-centered cubic unit cell has four atoms per unit cell.III. For unit cells having the same edge length, a simple cubic structure would have a smaller density than a body-centered cube.IV. Atoms in a solid consisting of only one element would have six nearest neighbors if the crystal structure were a simple cubic array.(A) I(B) II(C) II, III(D) I, IV(E) II, III, IV

12. Which of the following is the correct order of boiling points for KNO₃, CH₃OH, C₂H₆, Ne?
(A) Ne < CH₃OH < C₂H₆ < KNO₃
(B) KNO₃ < CH₃OH < C₂H₆ < Ne
(C) Ne < C₂H₆ < KNO₃ < CH₃OH
(D) Ne < C₂H₆ < CH₃OH < KNO₃
(E) C₂H₆ < Ne < CH₃OH < KNO₃

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