18. How many of the following molecules possess dipole moments?$\text{BH}_3$, $\text{CH}_4$, $\text{PCl}_5$, $\text{H}_2\text{O}$, $\text{HF}$, $\text{H}_2$ (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

25. Rank the following compounds according to increasing solubility in water.I. $\text{CH}_3-\text{CH}_2-\text{CH}_2-\text{CH}_3$ II. $\text{CH}_3-\text{CH}_2-\text{O}-\text{CH}_2-\text{CH}_3$ III. $\text{CH}_3-\text{CH}_2-\text{OH}$ IV. $\text{CH}_3-\text{OH}$ (A) $\text{I} < \text{III} < \text{IV} < \text{II}$ (B) $\text{I} < \text{II} < \text{IV} < \text{III}$ (C) $\text{III} < \text{IV} < \text{II} < \text{I}$ (D) $\text{I} < \text{II} < \text{III} < \text{IV}$ (E) None of these (A-D) is correct.

18. How many of the following molecules possess dipole moments?
$\text{BH}_3$, $\text{CH}_4$, $\text{PCl}_5$, $\text{H}_2\text{O}$, $\text{HF}$, $\text{H}_2$
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5

相關試題

相關試卷

18. How many of the following molecules possess dipole moments?$\text{BH}_3$, $\text{CH}_4$, $\text{PCl}_5$, $\text{H}_2\text{O}$, $\text{HF}$, $\text{H}_2$(A) 1(B) 2(C) 3(D) 4(E) 5

相關試題

相關試卷

18. How many of the following molecules possess dipole moments?
$\text{BH}_3$, $\text{CH}_4$, $\text{PCl}_5$, $\text{H}_2\text{O}$, $\text{HF}$, $\text{H}_2$
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5