9. Order the following in increasing rate of effusion: F₂, Cl₂, NO, NO₂, CH₄ (A) Cl₂ &lt; NO₂ &lt; F₂ &lt; NO &lt; CH₄ (B) Cl₂ &lt; F₂ &lt; NO₂ &lt; CH₄ &lt; NO (C) CH₄ &lt; NO₂ &lt; NO &lt; F₂ &lt; Cl₂ (D) CH₄ &lt; NO &lt; F₂ &lt; NO₂ &lt; Cl₂ (E) F₂ &lt; NO &lt; Cl₂ &lt; NO₂ &lt; CH₄

15. Which of the following statements is true? (A) Tetrahedral molecules (four identical bonds equally spaced) always has a dipole moment. (B) Both HF and CO₂ are linear molecules and therefore polar. (C) The correct order for molecules from most to least polar is CF₂H₂ > CCl₂H₂ > CF₂Cl₂ > CH₄ = CCl₄. (D) The molecular structure of SOCl₂ is trigonal planar. (E) The molecular structure of XeF₅⁺ is trigonal bipyramidal.

9. Order the following in increasing rate of effusion: F₂, Cl₂, NO, NO₂, CH₄
(A) Cl₂ < NO₂ < F₂ < NO < CH₄
(B) Cl₂ < F₂ < NO₂ < CH₄ < NO
(C) CH₄ < NO₂ < NO < F₂ < Cl₂
(D) CH₄ < NO < F₂ < NO₂ < Cl₂
(E) F₂ < NO < Cl₂ < NO₂ < CH₄

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9. Order the following in increasing rate of effusion: F₂, Cl₂, NO, NO₂, CH₄(A) Cl₂ < NO₂ < F₂ < NO < CH₄(B) Cl₂ < F₂ < NO₂ < CH₄ < NO(C) CH₄ < NO₂ < NO < F₂ < Cl₂(D) CH₄ < NO < F₂ < NO₂ < Cl₂(E) F₂ < NO < Cl₂ < NO₂ < CH₄

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9. Order the following in increasing rate of effusion: F₂, Cl₂, NO, NO₂, CH₄
(A) Cl₂ < NO₂ < F₂ < NO < CH₄
(B) Cl₂ < F₂ < NO₂ < CH₄ < NO
(C) CH₄ < NO₂ < NO < F₂ < Cl₂
(D) CH₄ < NO < F₂ < NO₂ < Cl₂
(E) F₂ < NO < Cl₂ < NO₂ < CH₄