The state of matter (solid, liquid, or gas) of a substance at a given temperature depends on its characteristic properties, such as melting point and boiling point. Without specific information about the substances in question, it is challenging to determine which substances will be solid at room temperature.
However, some substances commonly known to be solids at or near room temperature include table salt (sodium chloride), sugar (sucrose), metals like iron (Fe) and copper (Cu), as well as many minerals and rocks. These substances have relatively high melting points, which means they remain in solid form at temperatures typically encountered in indoor environments.
On the other hand, many substances are liquid at room temperature, such as water, ethanol, cooking oils, and various organic compounds. These substances have lower melting points, allowing them to exist in liquid form under normal conditions.
It is important to note that the exact melting points and states of matter for specific substances can vary. Some substances may exhibit polymorphism, where they can exist in multiple solid forms with different melting points. Other factors like pressure and impurities can also influence the melting points and states of substances.
To provide a more accurate answer, it would be helpful to know the specific substances you are referring to.