Question

answer 2nd and 3rd question I will Mark u as brainlist

Answer 1

liquid is a stage of molecules of a substance which is when get a high temperature is interchanged to gas.

when we give a needed high temperature to a solid(according to it's mass and density) the material is changed to liquid and sometimes it directly change to gas when it is a sublime substance (acetone, naphthalene balls, camphor)