Advertisements
Advertisements
Question
Which of the following will show Tyndall effect ? Why ?
- Salt solution
- Starch solution
- Milk
- Copper sulphate solution
Advertisements
Solution
Starch solution and milk will show Tyndall effect.
This is because in a milk solution and starch solution (colloidal solutions) the size of solute particles is big enough to scatter the light passing through it.
APPEARS IN
RELATED QUESTIONS
Define matter.
The best evidence for the existence and movement of particles in liquids was provided by :
What elements do the following compounds contain ?
Sugar, Common salt
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
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
Which of the following does not have a fixed melting point/boiling point ?
Which of the two will scatter light : soap solution or sugar solution ? Why ?
Define Foam Give one example.
Which of the following represents the solubility of sugar in water at 20°C ?
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?
Name the process by which common salt is purified.
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
How will you separate a mixture of common salt, sulphur powder and sand ?
What is chromatography ? State its two applications.
The boiling point of liquid argon is :
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.
