Explain this statement clearly: "To call a dimensional quantity 'large' or 'small' is meaningless without specifying a standard for comparison". In view of this,reframe the following statements wherever necessary:
$(a)$ atoms are very small objects
$(b)$ a jet plane moves with great speed
$(c)$ the mass of Jupiter is very large
$(d)$ the air inside this room contains a large number of molecules
$(e)$ a proton is much more massive than an electron
$(f)$ the speed of sound is much smaller than the speed of light.

(N/A) The statement is true because the terms 'large' and 'small' are relative. $A$ physical quantity can only be described as large or small when compared to a standard reference value.
$(a)$ Atoms are very small objects compared to a grain of sand.
$(b)$ $A$ jet plane moves with a speed much greater than that of a car.
$(c)$ The mass of Jupiter is very large compared to the mass of the Earth.
$(d)$ The air inside this room contains a large number of molecules compared to the number of molecules in a small test tube.
$(e)$ $A$ proton is much more massive than an electron (this statement is already meaningful as it compares two specific physical entities).
$(f)$ The speed of sound is much smaller than the speed of light (this statement is already meaningful as it compares two specific physical entities).