O-LevelChemistryAtomic Structure5070/11 · Oct/Nov 2023 · Q21 Mark
Data about two compounds is given. Both compounds have a simple molecular structure. compound, melting point /°C, boiling point /°C H2S, -85, -61 PCl3, -112, 76 Two bottles are placed, close together, inside a large container at a temperature of 90 °C. One bottle contains 1.0 g of H2S, the other bottle contains 1.0 g of PCl3. A detector is placed in the container 2.0m away from the two bottles. The two bottles are opened at the same time. Which row is correct? compound that reaches detector first, explanation
AH2S, gases diffuse faster than liquids
BH2S, H2S has a lower Mr than PCl3
CPCl3, gases diffuse faster than liquids
DPCl3, PCl3 has a lower Mr than H2S
✓ Correct answer
B: H2S, H2S has a lower Mr than PCl3
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