Match List I with List II. [2025]
| List I | List II | ||
| (Mixture) | (Method of separation) | ||
| A. | I. | Distillation under reduced pressure | |
| B. | Crude oil in petroleum industry | II. | Steam distillation |
| C. | Glycerol from spent-lye | III. | Fractional distillation |
| D. | Aniline-water | IV. | Simple distillation |
Choose the correct answer from the options given below :
A-III, B-IV, C-I, D-II
A-III, B-IV, C-II, D-I
A-IV, B-III, C-I, D-II
A-IV, B-III, C-II, D-I
(3)
A. Chloroform + Aniline - Simple distillation (IV)
B. Crude oil in petroleum industry - Fractional distillation (III)
C. Glycerol from spent-lye - Distillation under reduced pressure (I)
D. Aniline-water - Steam distillation (II)
A steam volatile organic compound which is immiscible with water has a boiling point of 250°C. During steam distillation, a mixture of this organic compound and water will boil [2024]
above 100°C but below 250°C
above 250°C
at 250°C
close to but below 100°C
(4)
If one of the substances in the mixture is water and the other, a water insoluble substance, then the mixture will boil close to but below, 373 K (100 °C).
On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as [2024]
crystallisation
sublimation
distillation
chromatography
Match List-I with List-II. [2023]
| List-I | List-II | ||
| (Mixtures/Sample) | (Technique used for purification) | ||
| (A) | Glycerol from spent lye | (I) | Steam distillation |
| (B) | Chloroform + Aniline | (II) | Fractional distillation |
| (C) | Fractions of crude oil | (III) | Distillation under reduced pressure |
| (D) | Aniline + Water | (IV) | Distillation |
Choose the correct answer from the options given below:
(A) - (III), (B) - (IV), (C) - (II), (D) - (I)
(A) - (IV), (B) - (II), (C) - (I), (D) - (III)
(A) - (I), (B) - (II), (C) - (III), (D) - (IV)
(A) - (I), (B) - (III), (C) - (II), (D) - (IV)
(1)
(A) Glycerol from spent lye → Distillation under reduced pressure
(B) Chloroform + Aniline → Distillation
(C) Fractions of crude oil → Fractional distillation
(D) Aniline + Water → Steam distillation
Paper chromatography is an example of [2020]
adsorption chromatography
partition chromatography
thin layer chromatography
column chromatography
(2)
Paper chromatography is a type of partition chromatography.
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is [2017, 1999, 1993]
chromatography
crystallisation
steam distillation
sublimation
(3)
The o- and p-nitrophenols are separated by steam distillation since o-isomer is steam volatile due to intramolecular H-bonding while p-isomer is not steam volatile due to association of molecules by intermolecular H-bonding.
[IMAGE 87]
