Question

Materials existing as liquids have______________.
A.Melting and boiling points above room temperature
B.Boiling point and melting point same as room temperature
C.Melting point and boiling point below room temperature
D.None of the above

Answer 1

Hint: Matter can be defined as any object that can occupy space and has volume. Liquid is one of the classifications of matter. Liquids have boiling point and melting point. Generally, liquids must have boiling point above the room temperature, and melting point below the room temperature.

Complete answer:
Materials or ant objects that can occupy space and have volume can be defined as matter. Matter was classified into three types based on the arrangement or packing of atoms in that molecule. They are solids, liquids, and gases.
Liquids do not have their own shape due to the greater volume and loose arrangement of atoms. The liquids must have the boiling point greater than the room temperature, if it is not like that the liquid can easily convert into gas. The melting point must be lower than the room temperature, if it is not like that the liquid will solidify at room temperature.
Thus, all the mentioned options i.e.. A, B, and C are not correct.

Option D is the correct one.

Note:
Solids have a rigid structure and closed packing as the atoms were arranged very tightly. In liquids the atoms were not very close, leading to the occupancy of higher volume compared to solids. In gases the atoms were arranged in the random or negligible manner leading to the greater volume compared to solids and gases. Based on the structures and volume, matter was classified into the above three types.