JEE MAIN - Chemistry (2019 - 11th January Morning Slot - No. 18)

The correct match between items I and II is :

Item-I (Mixture) Item-II (Seperation method)
(A) H2O : Sugar (P) Sublimation
(B) H2O : Aniline (Q) Recrystallization
(C) H2O : Toluene
(R) Steam distillation
(S) Differential extraction
A$$ \to $$(R); (B)$$ \to $$(P); (C)$$ \to $$(S)
A$$ \to $$(Q); (B)$$ \to $$(R); (C)$$ \to $$(S)
A$$ \to $$(Q); (B)$$ \to $$(P); (C)$$ \to $$(R)
A$$ \to $$(S); (B)$$ \to $$(R); (C)$$ \to $$(P)

Explanation

To find the correct match, let's understand what each separation method does :

  • Sublimation : The process where a substance changes directly from a solid to a gas without passing through the liquid state. This method is not applicable to any mixtures here as all components are either liquid or soluble in liquid.

  • Recrystallization : A method used to purify a solid. The impure compound is dissolved in a hot solvent and then allowed to slowly crystallize out as the solution cools. This could be used to separate sugar from water.

  • Steam Distillation : A separation process which consists in distilling water together with other volatile and non-volatile components. This could be used to separate aniline from water as aniline has a higher boiling point.

  • Differential extraction : It's a method that is used to separate a substance from a mixture by using an extracting solvent. This could be used to separate toluene from water as toluene is less polar and wouldn't dissolve well in water.

So, the correct match would be :

A -> Q : Water and sugar can be separated by recrystallization.

B -> R : Water and aniline can be separated by steam distillation.

C -> S : Water and toluene can be separated by differential extraction.

So, the correct option is Option C : A$$ \to $$(Q); (B)$$ \to $$(R); (C)$$ \to $$(S)

Comments (0)

Advertisement