Answer: The correct answer is Option D.
Explanation:
Element is defined as the substance which is made up of similar kind of atoms. For Example: [tex]H_2,Cl_2[/tex] etc...
Compound is defined as the substance which is made up of different kind of elements combined in a fixed ratio. For Example: [tex]CO_2,NO_2[/tex] etc...
For the given options:
Option A: [tex]H_2O[/tex]
This is a compound because it is made up of two types of atoms which are hydrogen and oxygen.
Option B: [tex]CH_4[/tex]
This is a compound because it is made up of two types of atoms which are hydrogen and carbon.
Option C: [tex]H_2SO_4[/tex]
This is a compound because it is made up of three types of atoms which are sulfur, hydrogen and oxygen.
Option D: [tex]N_2[/tex]
This is an element because it is made up of one type of atom which is nitrogen.
Hence, the correct answer is Option D.
