Question

Wheat flour can be separated from wheat bran by?
A. Handpicking
B. Sieving
C. Winnowing
D.Filtration

Answer 1

Hint:Separation techniques are the techniques which help in separating the compounds from the various mixtures. Separation can be done both physically and chemically.

Complete step by step answer:
Hand picking is a technique which is helpful in removing unwanted substances like small quantities of stones from rice, wheat and pulses. This technique is done with the help of hands. All the impurities are removed with the help of hands and only food items are left behindhand.
Winnowing is another physical separation technique which helps in removing impurities by the action of wind. In this technique the winnowing basket is shaken from the higher platforms which leads to the separation of what and husk from each other.
Sieving is a physical separation technique which separates the impurities based on their sizes. Sieve is used for separating the undesirable particles.
Filtration techniques is used in the separation of undesirable insoluble particles from the liquid. In this technique filter paper is used.
Therefore, wheat flour can be separated from wheat bran with the help of sieving technique.

Hence, the option B is correct.

Note:
Separation techniques are the techniques which help in separating the chemical compounds from the mixtures. Separation techniques are basically of two types which are as follows:
-Physical separation technique
-Chemical separation technique
Physical separation techniques are generally based on physical properties of the chemical substances. Various physical properties are specific gravity, boiling point, melting point, solubility, and physical state. For example handpicking, magnetism, solubility and so forth.
Chemical separation techniques are generally based on the chemical interactions among the mixture components. For example chromatography, extraction and so forth.