Advertisements
Advertisements
Question
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.
Advertisements
Solution
- Mixtures like A are known as suspensions.
- Mixtures like B are known as colloids.
- Mixtures like C are known as true solutions.
- The phenomenon exhibited by A and B, which occur on passing a beam of light through them, is called Tyndall effect.
- i. Mud water mixture is like A.
ii.Soap solution is a mixture like B.
iii. Sugar solution is a mixture like C.
APPEARS IN
RELATED QUESTIONS
Classify the following materials as homogeneous mixtures and heterogeneous mixtures :
Soda-water, Wood, Air, Soil, Vinegar, Alcohol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.
Name the process you would use to separate ammonium chloride from a mixture of sodium chloride and ammonium chloride.
Which of the following can be separated by using a separating funnel and which cannot be separated by using a separating funnel ?
- water and kerosene mixture
- water and acetone mixture
Give reasons for your answer.
Define the following:
Solution
List four characteristics of a mixture.
Name the components present in the following mixture:
Duralumin
State whether the following statement is true or false. If false write – the correct statement.
Components in a mixture can be separated by physical and chemical methods.
Give an example for mixture and justify your answer with reason.
What would you observe when
a saturated solution of potassium chloride prepared at 60°C is allowed to cool to room temperature.
Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixed together. Will it be a pure substance or a mixture? Give reasons for the same.
