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.
These are the strong acids. What makes them 'strong' is that they completely dissociate into their ions (H+ and an anion) when they are mixed with water. Any other acid is a weak acid. There are only seven strong acids, so you might want to commit the list of strong acids to memory. Note some instructors may ask for the 6 strong acids. That typically refers to the first 6 acids on this list.