If in a binary solution, forces of attraction between like-molecules are weaker than those prevailing between unlike-molecules, the solution is expected to exhibit ......... deviations from Raoult's law.

negative

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positive

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zero

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none

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Solution

The correct option is A negative
Negative deviation from Rault's law :
In these solutions the A-B interaction are stronger than the A-A and B-B molecular interactions present in the two liquids forming the solution. For thus solutions showing -ve deviation.
$Δ_{m i x} H < 0$
$Δ_{m i x} V < 0$

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Question 23
If two liquids A and B form minimum boiling azeotrope at some specific composition then
(a) A-B interactions are stronger than those between A-A or B-B
(b) vapour pressure of solution increases because more number of molecules of liquids A and B can escape from the solution
(c) vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution
(d) A-B interactions are weaker than those between A-A or B-B

Q. Assertion :Dipole-dipole forces acting between the molecules possessing permanent dipole, are weaker than ion-ion interactions. Reason: The attractive forces decrease with the increase of distance between the dipoles.

Q. At room temperature the forces of attraction between the particles of solid substances are ___ (stronger/weaker) than those which exist in the gaseous state.

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If in a binary solution, forces of attraction between like-molecules are weaker than those prevailing between unlike-molecules, the solution is expected to exhibit ......... deviations from Raoult's law.

The correct option is A negativeNegative deviation from Rault's law :In these solutions the A-B interaction are stronger than the A-A and B-B molecular interactions present in the two liquids forming the solution. For thus solutions showing -ve deviation.ΔmixH<0ΔmixV<0

The correct option is A negative
Negative deviation from Rault's law :
In these solutions the A-B interaction are stronger than the A-A and B-B molecular interactions present in the two liquids forming the solution. For thus solutions showing -ve deviation.
$Δ_{m i x} H < 0$
$Δ_{m i x} V < 0$