Question

The molecule having an
atomicity of 4 is:
Oxygen molecule
zone molecule

Water molecule
Ammonia molecule​

Answer 1

Explanation:

Atomicity is the number of atoms present in a substance.

A substance with atomicity 4 is NH3 ( ammonia )

It has 1 nitrogen atom and 3 hydrogen atoms. Together , there are 4 atoms i.e atomicity is 4.

I hope it helps you. If you have any doubts, then don't hesitate to ask.

Answer 2

Answer:

Ammonia Molecule (NH₃)

Explanation:

Atomicity is the number of atoms contained in each molecule.

So, let us take each option and find the respective atomicities

1. Oxygen Molecule -

The formula is O₂ and hence, it contains only 2 atoms in its molecule. Thus, atomicity = 2

Hence, this option can be ruled out.

2. Ozone Molecule -

The formula is O₃ and hence, it contains only 3 atoms of oxygen in its molecule. Thus, atomicity = 3.

This option can also be ruled out.

3. Water Molecule -

The formula is H₂O.

Here, we see it has 2 atoms of hydrogen and 1 atom of oxygen in its molecule. In this case, atomicity = the total number of atoms of different elements present in the molecule.

Hence, atomicity = (2+1)= 3. Hence, it can be ruled out.

Hence, the correct option is Ammonia

Now the question is WHY AMMONIA?

Let us see the formula of Ammonia.

It is NH₃. That is, it contains 1 nitrogen atom and 3 hydrogen atoms.

So, by atomicity, its atomicity is - 3+1 =4

and hence, the correct option is Ammonia.

THANK YOU.