Advertisements
Advertisements
प्रश्न
A mixture contains water, kerosene and sand. How will you separate this mixture ?
Advertisements
उत्तर
We will separate a mixture of kerosene oil, water and sand by the following process:
- First, we can separate sand from mixture by passing it through a filter paper or by decantation.
- After that, we get a mixture of kerosene and water. Leave it undisturbed for some time. Kerosene, being less dense than water, starts floating on it. By using a separating funnel, we can separate the mixture of kerosene and water.
- Another process is by distillation. Water has a low boiling point (100°c), which allows it to evaporate easily. But kerosene having a boiling point of 175°C will remain undisturbed. Care should be taken as kerosene is inflammable.
APPEARS IN
संबंधित प्रश्न
Is air a mixture or a compound ? Give three reasons for your answer.
What is meant by (i) homogeneous mixtures, and (ii) heterogeneous mixtures ? Give two examples of homogeneous mixtures and two of heterogenous mixtures.
Three mixtures A, B and C are obtained by stirring three different solids in water taken in separate beakers. When mixture A is allowed to stand for some time, then its particles settle at the bottom of the beaker. When a beam of light is passed through mixture A in a dark room, the path of light becomes visible when observed from the side of the beaker. When mixture B is allowed to stand for a considerable time, even then its particles do not settle down. Mixture B, however, scatters the beam of light just like mixture A. The particles of mixture C do not settle down on keeping and it also does not scatter a beam of light passing through it.
What are the mixtures like A known as ?
What are the mixtures like B known as ?
What are the mixtures like C known as ?
Name the phenomenon exhibited by A and B which occurs on passing a beam of light through them.
Name one mixture each which is like (i) A (ii) B, and (iii) C.
Name the process you would use to separate ammonium chloride from a mixture of sodium chloride and ammonium chloride.
Name the property of any one of the components which can be used for separating the following mixture :
Salt and Camphor
Define the following:
Heterogeneous mixture
Give a reason why sublimable and non-sublimable substances can be separated easily, but two sublimable substance cannot.
Name the following:
The component of the soluble solid-liquid mixture, which is lost to the atmosphere on heating.
Which of the following are physical changes?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
