သိကၡာ

အရက္သမားတို႕ မည္သည္ မည္ေသာအခါမွ အရက္ဝိုင္းတြင္ မေမွာက္ေစရ။ အိပ္ခန္းေရာက္မွသာ ေမွာက္ေတာ့မည္။ အျပင္မွာေတာ့ အန္ခ်င္အန္ထုတ္လိုက္ပါ။ အန္ဖတ္မ်ားကို ေခြးေလလြင့္ အေပါင္းတို႕ အား ေကြၽးေမြးျခင္းျဖင့္ ကုသိုလ္ယူပါမည္။

Alcohol

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This article is semi-protected indefinitely in response to an ongoing high risk of vandalism.
This article is about the generic chemistry term. For the kind of alcohol found in alcoholic beverages, see Ethanol. For beverages containing alcohol, see Alcoholic beverage. For other uses, see Alcohol (disambiguation).
Functional group of an alcohol molecule. The carbon atom is bound to hydrogen atoms and may bind to other carbon atom(s) to form a carbon chain. Methanol, an alcohol with a single carbon atom, is pictured. Ethanol, which is drinking alcohol, has two carbon atoms.

In chemistry, an alcohol is any organic compound in which a hydroxyl group (-OH) is bound to a carbon atom of an alkyl or substituted alkyl group. An important group of alcohols is formed by the simple acyclic alcohols, the general formula for which is CnH2n+1OH. Of those, ethanol (C2H5OH) is the type of alcohol found in alcoholic beverages, and in common speech the word alcohol means, specifically, ethanol.

Other alcohols are usually described with a clarifying adjective, as in isopropyl alcohol (propan-2-ol) or wood alcohol (methyl alcohol, or methanol). The suffix -ol appears in the IUPAC chemical name of all alcohols.

There are three major subsets of alcohols: primary (1°), secondary (2°) and tertiary (3°), based upon the number of carbon atoms the C-OH group's carbon (shown in red) is bonded to. Ethanol is a simple 'primary' alcohol. The simplest secondary alcohol is isopropyl alcohol (propan-2-ol), and a simple tertiary alcohol is tert-butyl alcohol (2-methylpropan-2-ol).