✏️Problem:

It is a technique of separating a less-dense substance from a dense one

A. filtering

B. sieving

C. evaporation

D. decantation

Answer:

B.Sieving

Explanation:

Sievng is a method that seperates a two subtances that is not join together it seperates uniformly.

Meanings:

What is less dense?Less dense than the liquid they are in. Water is more dense thanair, therefore water is below air. This explains why the oceans aren't in the sky.

Did sieving is mixture? No sieving actually it is filteration,when we want to separate solid particles from our sample,we filter it by using filter paper.

What is the two kind of Sieving analysis?

There are two kinds of Sieve analysis

1.Dry Sieving

2.Wet Sieving

Dry sieving can use Cement industry, Fertilizer industry, Building construction and some steps of the ceramic and glass Building construction and some steps of the ceramic and glassindustry.

Wet sieving is specially use in ceramic industry,pharmaceutical industry,cosmetics industry etc..

•••••D.Decantation•••••