Question
What is meant by aquatic animals and terrestrial animals?
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| Name | Molecular formula | Condensed structural formula | Number of carbon atom | Number of $-CH_2-$ units | Boiling point $^\circ C$ |
| Methanol | $CH_4O$ | $CH_3-OH$ | $1$ | $1$ | $63$ |
| Ethanol | $C_2H_6O$ | $CH_3–CH_2-OH$ | $2$ | $2$ | $78$ |
| Propanol | $C_3H_8O$ | $CH_3–CH_2–CH_2-OH$ | ______ | ______ | $97$ |
| Butanol | $C_4H_{10}O$ | $CH_3–CH_2–CH_2–CH_2–OH$ | ______ | ______ | $118$ |