Chemistry Trivia Quiz

H2O is the chemical formula for water. The "H" represents hydrogen, and the "O" represents oxygen. Therefore, H2O stands for water.

The correct answer is nucleus because it is the central part of an atom. It contains protons and neutrons, which make up most of the atom's mass. The electrons, on the other hand, orbit around the nucleus in energy levels. Sodium is an element, but it is not located in the center of an atom.

The symbol of potassium is "k" because it is derived from its Latin name "kalium." In the periodic table, chemical elements are represented by symbols, and the symbol "k" specifically represents potassium.

Water has a neutral pH of 7. This means that it is neither acidic nor basic. A pH of 4 indicates that the substance is acidic, while a pH of 11 indicates that it is basic. Therefore, the correct answer is 7, which represents a neutral pH for water.

Water boils at 100-degree centigrade. This is the standard boiling point of water at sea level. At this temperature, water changes from a liquid state to a gaseous state, forming water vapor. It is important to note that the boiling point of water can vary depending on factors such as altitude and impurities in the water. However, under normal atmospheric pressure, water boils at 100-degree centigrade.

Filtration is a method used to separate solid particles from a liquid or gas by passing it through a filter medium. In this process, the solid particles are retained by the filter while the liquid or gas passes through. This method is commonly used in various industries and laboratories for purification purposes.

An ionic bridge completes the circuit by allowing the flow of ions between two electrodes. It acts as a conductor, connecting the two electrodes and enabling the movement of charged particles. This ensures the continuous flow of electric current in the circuit.

Relighting a glowing splint is a test for oxygen because oxygen supports combustion. When a glowing splint is exposed to oxygen, it reignites because the oxygen present in the air reacts with the flammable material on the splint, allowing it to burn again. This reaction confirms the presence of oxygen.

Electrolysis is the process of breaking down an ionic compound into its constituent elements by passing an electric current through it. In this case, the correct answer is D.C (Direct Current) because electrolysis requires a continuous flow of electrons in one direction to facilitate the chemical reactions necessary for the compound to split up. Alternating Current (A.C) would not be suitable for electrolysis as it constantly changes direction, preventing the desired chemical reactions from occurring effectively. Therefore, D.C is the preferred type of electricity for electrolysis.

The molecule shown is methane (CH4), the simplest alkane and the main component of natural gas. It consists of one carbon atom bonded to four hydrogen atoms. Methane is a colorless, odorless gas that is widely used as a fuel source. It is also a greenhouse gas, contributing to climate change.