Which option incorrectly matches an atmospheric gas with its symbol?
Answer and explanation
Correct answer: Argon (CO₂)
The governing chemistry is the distinction between an element’s symbol and a molecular formula. Oxygen commonly occurs as O₂, nitrogen as N₂, and ozone as O₃. Argon is a monatomic noble gas represented by the symbol Ar, whereas CO₂ is the molecular formula for carbon dioxide. Hence D is the incorrect match. The question itself belongs to chemistry, but no supplied candidate has a suitable chemistry topic; candidate 8 is only the closest available subject-level choice.
Frequently asked questions
What is the correct answer to this question?
Argon (CO₂)
Why is this the correct answer?
The governing chemistry is the distinction between an element’s symbol and a molecular formula. Oxygen commonly occurs as O₂, nitrogen as N₂, and ozone as O₃. Argon is a monatomic noble gas represented by the symbol Ar, whereas CO₂ is the molecular formula for carbon dioxide. Hence D is the incorrect match. The question itself belongs to chemistry, but no supplied candidate has a suitable chemistry topic; candidate 8 is only the closest available subject-level choice.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chemical Bonding and Molecular Structure. Topic: Molecular Orbital Theory (MOT) of homonuclear diatomic molecules.
