Question

While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

• A. Threshing
• B. Sieving
• C. Winnowing
• D. Filtration

Answer 1

The correct option is B

Sieving

Explanation of the correct answer:

The correct answer is option B:

1. A separating method based on the variation in particle size is sieving. The bigger particles are kept in place by the sieve.
2. Due to the size difference between flour and grain, flour may be separated from wheat grains via the sieving process. The sieve won't let the wheat grain pass through.
3. Sieving is the process of removing particles from a mixture based on differences in particle size.
4. For separating coarse from fine particles, sieve plates are used.

Explanation of the incorrect answers:

Option A:

1. The process of separating the edible portion of grain from the straw to which it is connected is known as threshing or thrashing.

Option C:

1. The process of winnowing is used to separate the grain from the chaff. It can be used to clean bugs out of the grain that has been stored.

Option D:

1. Filtration is a physical separation procedure that uses a filter media with a complicated structure that only allows fluid to flow through it to separate solid particles and liquid from a combination.