Question

Arrange the following mixtures in the order of separation methods given below:

Gravity separation, centrifugation, fractional distillation, distillation, separating funnel.

(A) KNO₃ + Water

(B) Petrol + alcohol

(C) Water + alcohol

(D) Sand + finely powdered chalk

(E) Blood

• A. D,E,C,A,B
• B. D,C,A,E,B
• C. C,A,D,E,B
• D. C,E,A,B,D

Answer 1

The correct option is A

D,E,C,A,B

The explanation for the correct option A:

1. Gravity separation: It is used to separate components based on weight and density. It separates settleable solid due to gravity and lighter component is washed away with water. Sand + finely powdered chalk (D) is separated using this method as the sand settles down due to gravity and powdered chalk is washed away.
2. Centrifugation: It separates compounds with different densities by spinning their solution at an axis at high speed in a machine. The denser compounds of the mixture migrate away from the axis, and the less dense compounds of the mixture migrate towards the axis. Configuration is used to separate the components of the blood (E).
3. Fractional distillation: It is used to separate compounds with different boiling points like water and alcohol (C).
4. Distillation: It is based on selective boiling of components of the mixture and then condensing them in different containers. KNO₃ and water (A) are separated using the distillation method.
5. Separating funnel: A separating funnel is used to separate two immiscible liquids as denser liquid settles down and is removed in a different container. Petrol and alcohol (B) are immiscible with each other, thus they can be separated using a separating funnel.
6. Hence, the given mixtures are arranged in the order of separation methods as D,E,C,A,B

Conclusion: The correct option is a) D,E,C,A,B.