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Basics of Organic Chemistry question

2019 · 11 Jan · Shift 1 · Q18
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Basics of Organic Chemistry question

2019 · 11 Jan · Shift 1 · Q18

JEE MainChemistryBasics of Organic ChemistryMCQ+4 / −1
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
  1. A
    A →\to→(R); (B) →\to→(P); (C) →\to→(S)
  2. B
    A →\to→(Q); (B) →\to→(R); (C) →\to→(S)
  3. C
    A →\to→(Q); (B) →\to→(P); (C) →\to→(R)
  4. D
    A →\to→(S); (B) →\to→(R); (C) →\to→(P)
View written solutionFree

Correct answer: B

  1. Identify the suitable separation method for each mixture

    We match each mixture in Item-I with the correct method in Item-II.

  1. Mixture (A): H2O:Sugar\mathrm{H_2O : Sugar}H2​O:Sugar

    • Sugar is a solid soluble impurity/solute in water.
    • Such mixtures are commonly separated by recrystallization (or evaporation/crystallization).
    • Among the given options, the appropriate method is (Q) Recrystallization.

    Hence, A→QA \to QA→Q

  1. Mixture (B): H2O:Aniline\mathrm{H_2O : Aniline}H2​O:Aniline

    • Aniline is an organic liquid, only sparingly soluble in water, and is steam volatile.
    • Organic compounds like aniline can be separated from water by steam distillation.

    Hence, B→RB \to RB→R

  1. Mixture (C): H2O:Toluene\mathrm{H_2O : Toluene}H2​O:Toluene

    • Toluene is immiscible with water.
    • Immiscible liquid mixtures are separated using a separating funnel, i.e. differential extraction in the given list.

    Hence, C→SC \to SC→S

  1. Final matching

    A→Q,B→R,C→SA \to Q, \quad B \to R, \quad C \to SA→Q,B→R,C→S

    This corresponds to Option B.

  1. Comparison with stored answer

    • Derived answer: B
    • Stored correct answer: B

    Both match.

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