Boiling points of different substances are given belowCH4 = - 16 °CC2H6 = -89 °CCI2 = -34.6 °CF2 = -188 °CThe data shows that vapour pressure of
Correct answer: B. CI2 > F2 > CH4 > C2H6
- A. CI2 > C2H6 > CH4 > F2
- B. CI2 > F2 > CH4 > C2H6
- C. C2H6 > CH4 > F2 > CI2
- D. F2 > CH4 > C2H6 > CI2
Explanation
The boiling points of substances are related to their vapor pressures at a given temperature. In this case, the substances with higher boiling points generally have lower vapor pressures at a given temperature.Given the boiling points:Cl2 (chlorine) has the highest boiling point (-34.6 °C).F2 (fluorine) has the next highest boiling point (-188 °C).CH4 (methane) has a higher boiling point (-161 °C) than C2H6 (ethane) (-89 °C).Therefore, the correct order of vapor pressures from lowest to highest is Cl2 > F2 > CH4 > C2H6, leading to option b.
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