Match List I with List II and select the correct answer using the code given below the Lists :
| List I (Process) |
List II (Separation method) |
|---|---|
| A. Separation of acetone and water from their mixture | 1. Chromatography |
| B. Separation of water and kerosene oil from their mixture | 2. Centrifugation |
| C. Separation of cream from milk | 3. Distillation |
| D. Separation of pigments from plant extract | 4. Separating Funnel |
A-3, B-2, C-4, D-1
A-4, B-2, C-1, D-3
A-3, B-4, C-2, D-1
A-4, B-1, C-2, D-3
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC NDA-2 – 2023
– A. Separation of acetone and water from their mixture: Acetone and water are miscible liquids with different boiling points. Distillation is used to separate miscible liquids based on differences in volatility. Acetone boils at a lower temperature (around 56°C) than water (100°C), allowing it to be vaporized and condensed separately. This matches with 3. Distillation.
– B. Separation of water and kerosene oil from their mixture: Water and kerosene oil are immiscible liquids with different densities. They form two distinct layers when left undisturbed. A separating funnel is used to separate immiscible liquids, allowing the denser liquid (water) to be drained out from the bottom. This matches with 4. Separating Funnel.
– C. Separation of cream from milk: Milk is a suspension or emulsion of fat globules (cream) in a watery phase. Centrifugation is used to separate components of a mixture based on density differences using centrifugal force. Spinning milk rapidly forces the denser skim milk to the periphery while the lighter cream concentrates towards the center. This matches with 2. Centrifugation.
– D. Separation of pigments from plant extract: Plant extracts contain a mixture of different colored pigments. Chromatography is a technique used to separate components of a mixture based on their differential partitioning between a stationary phase and a mobile phase. Different pigments travel at different rates, allowing them to be separated. This matches with 1. Chromatography.
– Separating funnel is used for immiscible liquids.
– Centrifugation is used to separate components based on density differences, often for solid-liquid suspensions or liquid-liquid emulsions.
– Chromatography is a versatile technique for separating components based on differential affinities to stationary and mobile phases, widely used for separating colored substances (pigments).