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Question
The mixture which shows positive deviation from Raoult's law is
[NEET 2020]
The mixture which shows positive deviation from Raoult's law is
[NEET 2020]
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Solution
The correct option is A Ethanol + Acetone
In positive deviation from Raoult's Law, the resulting solution has more vapour pressure than the ideal solution of the constituent liquids.
This is because the A−B interactions are weaker than A−A & B−B ones.
Because there is hydrogen bonding present in the ethyl alcohol solution and acetone molecules tend to occupy the space between them due to which some hydrogen bonds breaks, results in weaking of A−B interaction.
- Chloroethane + Bromoethane forms ideal solution
- Benzene + Toluene forms ideal solution
- Acetone + chloroform shows negative deviation from Raoult's law
Option (a) is correct.
In positive deviation from Raoult's Law, the resulting solution has more vapour pressure than the ideal solution of the constituent liquids.
This is because the A−B interactions are weaker than A−A & B−B ones.
Because there is hydrogen bonding present in the ethyl alcohol solution and acetone molecules tend to occupy the space between them due to which some hydrogen bonds breaks, results in weaking of A−B interaction.
- Chloroethane + Bromoethane forms ideal solution
- Benzene + Toluene forms ideal solution
- Acetone + chloroform shows negative deviation from Raoult's law
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