An exam or examination is an official test that shows your knowledge or ability in a particular subject. Exam is the word most commonly used. Examination is more formal and is used mainly in written English.
Strong Acids and Bases. Acids and bases that are completely ionized when dissolved in water are called strong acids and strong bases There are only a few strong acids and bases, and everyone should know their names and properties. These acids are often used in industry and everyday life. The concentrations of acids and bases are often expressed in terms of pH, and as an educated person, you should have the skill to convert concentrations into pH and pOH.
1 Though it is not a good idea to taste chemicals, acids have a sour taste and bases taste bitter. 2  When they are in solution with water, acids feel rough and bases feel slippery. 3  Some acids and bases are present in foods and in household items. 4  These are relatively safe to handle. Though it is not a good idea to taste chemicals, acids have a sour taste and bases taste bitter. 2  When they are in solution with water, acids feel rough and bases feel slippery. 3  Some acids and bases are present in foods and in household items. 4  These are relatively safe to handle.