Question:
How are sol, solution and suspension different from each other?
Answer:
| Property | Solution | Sol(Colloid) | Suspension |
|---|
| 1. Particle Size (1 nano-m = 10-9 m) | less than 1 nm | 1 nm to 100 nm | More than 100 n-m |
| 2. Appearance | Transparent | Translucent | Opaque |
| 3. Particles Visibility | Not visible even under powerful microscope | Visible under powerful microscope | Visible to the naked eye |
| 4. Nature | Homogeneous | Heterogeneous | Heterogeneous |
| 5. Diffusion of particles | diffuses rapidly | diffuses slowly | diffusion does not occur |
| 6. Scattering of Light | Does not scatter light | It scatters light | It scatters light |
Is Matter Around Us Pure?
Q 1.
What is the general name of the process by which tea-leaves are separated from prepared tea ?
Q 2.
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
Q 3.
Classify the following as physical or chemical changes :
(i) Cooking of food
Q 4.
Name one pair of substances whose mixture can be separated by fractional distillation.
Q 5.
Name one pair of liquids which can be separated by using a separating funnel.
Q 6.
What type of magnet is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?
Q 7.
To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293K. Find its concentration at this temperature.
Q 8.
Calculate the mass of glucouse and mass of water required to make 200g of 25% solution of glucouse.
Q 9.
Define Brownian movement in colloids.
Q 10.
Name the property :
(a) which allows metals to be hammered into thin sheets.
(b)
Q 11.
Give two reasons for supposing that water is a compound and not a mixture.
Q 12.
Name the property of any one of the components which can be used for separating the following mixture : Salt and Camphor
Q 13.
State the differences between compounds and mixtures.
Q 14.
What are non-aqueous solutions?
Q 15.
What is saturated solution? Explain with an example.
Q 16.
Name a non-metal which is a good conductor of electricity.
Q 17.
Name the process which can be used to separate a mixture of salt solution and sand.
Q 18.
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
Q 19.
Identify the following as mixture or compound.
(i) blood
(ii) common salt
(iii) sugar
(iv) brass
Q 20.
Give examples of liquids that are
(i) completely miscible
(ii) partially miscible
(iii) practically immiscible
Q 21.
State whether the following statement is true or false : Milk is a pure substance.
Q 22.
Which of the following is a mixture ?Salt, Air, Water, Alum, Sugar
Q 23.
What is meant by saying that metals are malleable and ductile ?
Q 24.
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
Q 25.
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
Q 26.
Name the process you would use to separate ammonium chloride from a mixture of sodium chloride and ammonium chloride.
Q 27.
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
Q 28.
Name the source from which nitrogen and oxygen are obtained on a large scale.
Q 29.
Name the apparatus you would use to separate oil from water.
Q 30.
How is cream separated from milk ?
Q 31.
What are different categories of pure substance?
Q 33.
What are the kinds of mixture?
Q 34.
What is meant by solute and solvent?
Q 35.
Explain with an example what is a colloid?
Q 36.
How are sol, solution and suspension different from each other?
Q 37.
What are different ways to separate solid mixtures?
Q 38.
How many elements are there which are in gaseous state at room temperature?
Q 39.
Who used the term 'element' first time?
Q 40.
What is the general name of the materials which contain at least two pure substances and show the properties of their constituents ?
Q 41.
What are pure substances ? Give two examples of pure substances.
Q 42.
Name any two solid substances whose mixture can be separated by sublimation.
Q 43.
Name one pair of substances whose mixture can be separated completely by distillation.
Q 44.
How will you separate a mixture of chalk powder and water ?
Q 45.
Name the process which is used in milk dairies to separate cream from milk.
Q 46.
Name the process you would use to separate a mixture of water and alcohol.
Q 47.
On the basis of composition, how matter is classified?
Q 48.
What is a compound? Give an example.
Q 49.
Based on the type of solvent, how solutions are classified?
Q 50.
What is an unsaturated solution?
