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SAT Subject Test
Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the one that is best in each case.
All of the following statements about carbon dioxide are true EXCEPT:
Select an Answer
It can be prepared by the action of acid on limestone.
Correct Answer:
No
It is used to extinguish fires.
Correct Answer:
No
It dissolves in water at room temperature.
Correct Answer:
No
It sublimes rather than melts at 
and 
atmosphere pressure.
Correct Answer:
No
It is less dense than air at a given temperature and pressure.
Correct Answer:
Yes
View Correct Answer
Air contains mostly 
and 
. The molar mass of carbon dioxide is 
, so carbon dioxide is more dense than air. The other statements are true and are not correct choices.
Question Difficulty:
medium