Advertisements
Advertisements
Question
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
Solution
Solutions – Brine
Suspensions – Chalk water mixture, milk of magnesia, Muddy river water
Colloids – Milk, blood, ink, shaving cream, smoke in air, soda water
APPEARS IN
RELATED QUESTIONS
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
What elements do the following compounds contain ?
Sugar, Common salt
What are the two types of pure substances? Give one example of each type.
Name a metal which forms amalgams.
On the basis of composition of matter, milk is considered to be :
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
Define Sol and give one example.
Which of the following is not an emulsion ?
One of the following represents the solution of solid in a solid. This one is :
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
How will you separate a mixture of iron filings and powdered carbon ?
Describe the method of separating a mixture containing common salt, sand and ammonium chloride.
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Wipe the board with a duster and then tap the duster against the table. What do you see?
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
A standard sheet of paper is about ______ of atoms thick
Define the term matter.
