Question

4. Give scientific reasons.
(a) Buttermilk is churned to get butter.
(b) In chromatography, the ingredients of
a mixture rise up to a limited height
when water rises up to the upper end
of the paper.
(c) A wet cloth is wrapped around a water
storage container in Summer​

Answer 1

Answer:

Ans1. Buttermilk is churned to get butter as due to churning butter which is more dense than milk settles at the bottom. This process is called CENTRIFUGATION.

Ans 2.A wet cloth is wrapped around water containers in summers to keep the container and the water inside it cools. The water present in the cloth evapourates and along with that water the heat also evapourates thus keeping the container and water cool.

Ans3.These properties are different for different substances and are mutually opposite to each other. It is the reason why all the components of the mixture rise up to a limited height when the water rises up to the upper end of the paper.

Answer 2

buttermilk is churned to get butter as due to churning butter than milk settles at the bottom this process is called CENTRIFUGATION