is alcohol that burns in the air physical or chemical properties?
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A chemical properties
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Hydrogen gas (H2) is very combustable, (Oxygen gas [O2] is not), but water (H2O) does not burn.\n\nWhen substances are reacted, their chemical propertis change completely. In the case of Hydrogen and Oxygen gas, when these two substances combust, the product is water.  Water represents the produce of the two substances burning, it is no longer the original substances, it is totally new.\nJust like you cannot burn the ashes of a camp fire like you would be able to new wood, you cannot burn water since it has already been chemically reacted.\n\nThe Hydrogen is already bonded with the Oxygen in the case of water, there is no reason for it to furhter react with Oxygen since it is already in a stable state.
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An alkaline substance, it burns but is the opposite of an acid.(e.g. Sodium Hydroxide)
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when ethanol is burned, it emits acetaldehide — considered a probable human carcinogen by the EPA
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It is mostly composed of alcohol.  An alcohol/gasoline mix has a lower freezing point than straight gasoline, and mixing in alcohol does not adversely affect the combustion characteristics of gas in most engines.
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The actual reason that alcohol evaporates quicker than water has to do with vapor pressure.\n\nAll liquids have a certain amount of vapor at the surface of the liquid.  Since the intermolecular forces are weaker within a smaple of alcohol than within a smaple of water, there is more vapor present above the surface of alcohol than above the surface of water. The more vapor above the surface, the higher the vapor pressure.  The higher the vapor pressure, the faster the rate of evaporation. \n\nSince there is more vapor present above the surface of the alcohol, more molecules will randomly leave the surface and go into the air surrounding the container.  This is the process of evaporation, which is different than boiling.  The two are related, but not the same.\n\nThis difference in rates of evaporation has nothing to do with the heat capacities of water and alcohol.
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Chemical properties are properties such as boiling point, freezing point, melting point, electronegativity, flammability, and so forth.  Physical properties are the ones the human senses can pick up with out having to change the chemical, such as taste, smell, sound.
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The problem with most alcohols is that they burn without a flame, or a flame that hardly visible.  If an alcohol lamp is hot, it may not be easy to determine whether or not it is still burning.  Refilling a lamp while it is still burning presents a serious fire hazard, let alone an opportunity to get seriously hurt.\n\nI'm not certain as to where it's "not allowed" (perhaps your school chemistry lab?), but it's certainly a good idea not to do it.
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water, rubbing alcohol or if nothing else acid :P(dont really do acid)
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Alcohol has a low flash point and burns with a near invisible flame.  It would be easy to start an uncontrolled flame that would be difficult to see.  All of which could lead to disasterous results.
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In Medical terms, it is used for ethanol (alcohol)
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methyl alcohol has all 3 intermolecular forces: dispersion, dipole and hydrogen bonding. the way your question is worded is unusual. molecular forces don't cause liquids to evaporate, they prevent it.
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Sugar alcohol is derived from sugar but has an alcohol chemical make-up.  They have sweetening properties but provide fewer calories therefore they don't impact blood sugar in the same way that sugar does.
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alcohols have a hydroxyl group, which the oxygen atom is electronegative and induces polarisation to the O-H bond, that means the oxygen atom is negatively changed and the hydrogen atom is positively charged (in the hydroxyl group). So that hydrogen atom in the hydroxyl group attracts to other negatively charged oxygen atoms on another molecule, so the 2 are held together by what is called hydrogen bonding\n\nalkane molecules only hold on together by Van der Waals forces, which is weak, whereas alcohols hold on together by hydrogen bonding and Van der Waals forces, which is a lot stronger\n\nso with stronger intermolecular forces, molecules hold on to each other stronger and therefore results as a higher boiling and melting point
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Pure dry Ethanol (Ethyl alcohol) boils at 78.5 degrees C.  This is a little higher than the typical 78.3 °C or 78.4 °C reported in many older texts.\n\nIf you are talking about a still, Ethanol forms a constant-boiling mixture, or azeotrope, with water that contains 95% ethanol and 5% water and that boils at 78.15°C
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Aside from oils, most alcohols (though not all) are lighter.  Ethanol is toxic in high levels, and the other alcohols are even more so.  If you notice, in nature, there are very few fluids other than water.
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burning is atmospheric OXIDATION