3.Name the following- a) A mixture of two or more liquid components that are immiscible b) A method which is used to separate stone and pebbles from sand c) A state of matter which flows in all directions d) A homogeneous solid mixture of two or more metals or a metal and a small amount of non-metal e) A method which is used to separate solids from a homogeneous mixture of a solid and liquid having different densities.
Answers
Answer:
a) Those liquids which do not mix with each other and form separate layers are called immiscible liquids.
Ex: Oil and water are immiscible liquids because they do not mix with each other., and form separate layers on mixing. Water being heavier forms the lower layer, and oil being lighter forms the upper layer. A mixture of immiscible liquids is separated by using an apparatus called separating funnel.
b) Sieving is a process by which fine particles are separated from bigger particles by using a sieve. It is used in flour mills or at construction sites. In a flour mill, impurities like husks and stones are removed from wheat. Pebbles and stones are removed from sand by sieving.
c) Liquid crystal states have properties intermediate between mobile liquids and ordered solids. ... In this state, the molecules flow as in a liquid, but they all point in the same direction (within each domain) and cannot rotate freely.
d) An alloy is a homogenous mixture of two or more metals or non-metals or nonmetals mixed in a molten state. ... It can either be a solid solution of the elements of a single-phase or a mixture of two or more metallic phases.
e)Centrifugation is a technique that, by rotating the sample at high speed, separates solids suspended in a liquid (or liquids of different densities).