Question

All of the following statements about carbon dioxide are true except :

• A. it can be prepared by the action of acid on limestone
• B. it is used to extinguish fires
• C. it dissolves in water at room temperature
• D. it sublimes rather than melts at 20 degrees C and 1 atmosphere pressure
• E. it is less dense than air at a given temperature and pressure

Answer 1

The correct option is E it is less dense than air at a given temperature and pressure

Carbon dioxide is more dense than air at a given temperature and pressure.
It is about 1.5 times as heavy as air and can be poured downward like water.