Which of the following metals exists as liquid at ordinary temperature?
Answer Details
Mercury is the only metal among the given options that exists as a liquid at ordinary temperature. Copper, gold, and silver are all solid at room temperature and require high temperatures to melt and become liquid. Mercury, on the other hand, has a melting point of -38.83°C and a boiling point of 356.73°C, making it liquid at room temperature. Therefore, the correct answer is "Mercury".