I. Arrange the compounds of (a) in the order of decreasing boiling points and (b) in the order of decreasing solubility in water.
(A) (1) Ethanol, (2) Propane, (3) Pentanol
(B) (1) Butane, (2) 1,2,3-Pentane triol, (3) Butyl alcohol
(C) (1) Pentane, (2) Pentanol, (3) Hexanol
II. Arrange the following in the decreasing order of their boiling points.
(A) (1) `C_(3)H_(8)`, (2) `C_(2)H_(5)OH`, (3) `(CH_(3))_(2)O`, (4) `HOH_(2)C----CH_(2)OH`
(B) (1) 3-pentanol, (2) n-Pentane, (3) 2,2-Dimethyl propanol, (4) n-Pentanol
III. Arrange the following alcohols (a) in the decreasing order of their boilling points and (b) in the decreasing order of their solubility in water.
(1) n-Butyl alcohol
(2) sec-Butyl alcohol and
(3) tert-Butyl alcohol
IV. Arrange the following compounds in the order of their increasing boiling points.
(1) `CH_(3)COC1` , (2) `(CH_(3)CO)_(2)O` , (3) `CH_(3)CONH_(2)` , (4) `CH_(3)COOH`

Explanation

To solve the question, we will break it down into parts as given in the question.

### Part I: Arrange the compounds in order of decreasing boiling points and solubility in water.

#### (A) Compounds: Ethanol, Propane, Pentanol
1. **Boiling Points:**
- Ethanol (C2H5OH) and Pentanol (C5H11OH) are alcohols and can form hydrogen bonds due to their -OH groups.
- Propane (C3H8) is a non-polar alkane and cannot form hydrogen bonds.
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