The correct match between items I and II is: Item - I (Mixture) (a) $\ce{H2O}$ : Sugar (b) $\ce{H2O}$ : Aniline (c) $\ce{H2O}$ : Toluene Item - II (Separation method) p. Sublimation q. Recrystallization r. Stem distillation s. Differential extraction

JEE Main · 2019 · 11 Jan 2019 · Shift 1 · Practical and Analytical Chemistry

The correct match between items I and II is:

Item - I (Mixture)
(a)

H X_{2} O

: Sugar
(b)

H X_{2} O

: Aniline
(c)

H X_{2} O

: Toluene

Item - II (Separation method)
p. Sublimation
q. Recrystallization
r. Stem distillation
s. Differential extraction

(A) $a - d, b - r, c - p$
(B) $a - q, b - r, c - s$ ✓ Correct
(C) $a - r, b - p, c - s$
(D) $a - q, b - r, c - p$

Answer: (B)

Solution

Match each mixture to the method that exploits the right difference. Sugar in water is recovered by recrystallisation, since sugar crystallises out cleanly on concentrating and cooling. Aniline with water is separated by steam distillation, the standard route for a sparingly soluble, steam-volatile liquid. Toluene and water, being immiscible, are parted by differential extraction with a solvent. So sugar pairs with recrystallisation, aniline with steam distillation, and toluene with differential extraction.

JEE Main · 2019 · 11 Jan 2019 · Shift 1 · Single correct option

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JEE Main · 2019 · 11 Jan 2019 · Shift 1 · Practical and Analytical Chemistry

Solution

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