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Q.

Statement-1 : Acetone + Carbon disulphide solution shows positive deviation from Raoult’s lawStatement-2 : Acetone + Aniline solution shows positive deviation from Raoult’s law

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a

Both statement-1 and statement-2- are correct

b

both  statement-1  and statement-2- are wrong

c

Statement-1 is correct and statement-2 is wrong

d

Statement-1 is wrong and statement-2 is correct

answer is C.

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Detailed Solution

(I)    Let A=Acetone  ;   B=CS2A-A ...... dipole- dipole forcesB-B ...... London dispersive forces'B' molecules disturbs the dipole- dipole attractions between' A' moleculesThus A-B interactions are weaker than in A-A & B-B V.P is higher than that expected And the mixture shows positive deviation from Raoult's law                             (I) is True(II)   Let A=Aniline  ;  B= AcetoneA-A .... inter molecular H-bonded forcesB-B .... dipole- dipole attractionsStrong inter molecular H-bonded forces are present between A & B moleculesThus A-B interactions are stronger than  A-A & B-B interactions V.P is lesser than that expected And the mixture shows negative deviation from Raoult's law(II) is false
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