Alcohol is a drug found in alcoholic drinks whereas liquor is a name for these drinks.  Liquor is a drink that contains alcohol though not every alcoholic beverage is called liquor for ex. beer, wine & malts.

The basic difference between liqueur and liquor is that liqueur is a combination of distilled beverages whereas liquor is distilled into ethyl alcohol and water.

Research shows that if one has food before gulping down a few drinks then the alcohol gets stored in the stomach from where it gets absorbed slowly into the blood stream. Due to this the liver gets more time to break down the alcohol. If one has drinks without eating anything then the alcohol is directly absorbed without being broken down into the blood stream and this can damage the liver.

Always remember that lesser the head the better it is while pouring beer.  One should hold a glass at 45 degree and target the beer at the middle of the slope of the glass. Once half full bring the glass back to 90 degree and continue pouring the beer into the middle of the glass.

This is a very tough question to answer. No one can confidently say which the strongest alcohol in the world is as there are so many strong drinks spread across various continents. Here is a list of a few strong drinks - Absinthe, Spirytus, Everclear, Devil springs vodka & Dominican mamajuana. It is however advisable if you stay away from them as too much consumption of these drinks can be really fatal.

Sam Adams Utopias MMII & Samuel Adams Millennium currently holds the record as the strongest beer in the world. It weighs in at 24 percent ABV. The other strong beer contenders are World wide stout with 18 percent ABV, Raison d’ extra with 20 percent ABV, Sam Adam’s triple dock with 17.5 percent ABV, Olde School with 15 percent ABV & Belzebuth with 15 percent ABV.