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Osmotic Pressure

For an ideal ...

Question

For an ideal solution, $Δ_{m i x} H$ is _______ .

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Solution

Ideal Solutions : A solution which obeys Rault's law exactly at all concentrations and at all temperatures is called an ideal solution.
An ideal solution possesses the following characteristics :
(i)Volume change of mixing shoule be zero.
V solvent + V solute = V solution
(ii)Heat change on mixing should be zero.

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Q. Assertion :In an ideal solution,

Δ_{m i x} H

is zero. Reason: In an ideal solution, A-B interactions are lower than A-A and B-B interactions.

Q. For a non-ideal solution exhibiting positive deviation from Raoult's law,

Δ_{m i x} H

has a ............... (nonzero)

State True or False.

For a non-ideal solution ,

Δ_{m i x} V

Δ_{m i x} H

Q. Match the column I with column II and mark the appropriate choice

Column I	Column II
(A) $Δ_{m i x} H = 0, Δ_{m i x} V = 0$	(i) Non-ideal solution
(B) $Δ_{m i x} H \neq 0, Δ_{m i x} V \neq 0$	(ii) Positive deviation
(C) $Δ_{m i x} H < 0, Δ_{m i x} V < 0$	(iii) Ideal solution
(D) $Δ_{m i x} H > 0, Δ_{m i x} V > 0$	(iv) Negative deviation

Q. For an ideal solution,

Δ_{m i x} V

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