Question

All the following statements are true about carbon dioxide except:

• A. Its molecular formula is $C{O}_2$
• B. Its molecular mass is 44 u
• C. Dense than air
• D. It always exists as gas

Answer 1

The correct option is D It always exists as gas

Carbon dioxide has a molecular formula $C{O}_2$ and has a molecular mass of 44 u. It is denser than air, because of which it is used in fire extinguishers.

Although it exist as a gas in the atmosphere, it can be converted into solid by reducing the temperature and increasing the pressure. Solid carbon dioxide is also called dry ice.