Question

The chemical formula of sulfur trioxide is…..

• A. ${\mathrm{SO}}_3$
• B. SO
• C. ${\mathrm{SO}}_2$
• D. ${\mathrm{SO}}_4$

Answer 1

The correct option is A

${\mathrm{SO}}_3$

The explanation of the correct option

Option A,${\mathrm{SO}}_3$

• Chemical formula is a representation of a compound or molecule with its symbols.
• In a sulfur trioxide one atom of Sulphur combines with three atoms of oxygen.

The explanation of incorrect options

Option B, SO.

• It is an unstable gas of sulfur and oxygen atoms.
• It is found in mixtures of sulfur gases like sulfur dioxide and trioxide.

Option C,${\mathrm{SO}}_2$.

• ${\mathrm{SO}}_2$ is a chemical formula of sulfur dioxide in which two atoms of oxygen are combined with one atom of sulfur.
• Sulfur dioxide irritates the eyes and has an effect on the respiratory system, especially lung function.

Option D ${\mathrm{SO}}_4$

• It is not found as it is unstable or it doesn't exist.

Thus Option A${\mathrm{SO}}_3$ is the correct option.