3.Which of the following metals exist in the liquid state at room temperature?
Mercury
Explanation for the correct option:
c) Mercury is the only metal that exists as a liquid at room temperature.
Explanation for the incorrect options:
a) Magnesium is a metal but it is hard at room temperature.
b) Manganese is hard at room temperature.
d) Sodium is a metal and it is soft in nature. It is solid at room temperature.
Therefore, option C is correct.