Question 33
Kinetic Theory and States of MatterThe following compounds are given with their corresponding boiling points
Compound I: 14°C
Compound II: 24°C
Compound III: 0°C
Compound IV: 120°C
Compound V: −2°C
From the above information, indicate which of the following is correct
- A.All the compounds are gaseous at 20°C.
- B.One of the compounds is gaseous at 20°C.
- C.Two of the compounds are gaseous at 20°C
- D.Three of the compounds are gaseous at 20°C
- E.None of the compounds is gaseous at 20°C
Show the answer and explanation
Answer: D (Three of the compounds are gaseous at 20°C)
Explanation
A substance is a gas at 20°C if its boiling point is below 20°C. That is true for I (14°C), III (0°C) and V (−2°C): three compounds.