Advertisements
Advertisements
प्रश्न
Explain what happens when a beam of light is passed through a colloidal solution.
Explain what is observed when a beam of light is passed through a colloidal solution.
Advertisements
उत्तर
A true solution can be distinguished from a colloidal solution by observing the Tyndall effect. A true solution does not scatter a beam of light passing through it, but a colloidal solution scatters a beam of light passing through it.
संबंधित प्रश्न
The molecules can move freely anywhere in
Fill in the blank :
The state of matter with definite volume and definite shape is called______
Name the property which enables metals to be drawn into wires.
What is meant by saying that metals are sonorous ?
“Is malleable and ductile” best describes :
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
State whether colloidal solutions are homogeneous or heterogeneous.
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
One of the following liquids will leave behind a residue on heating. This one is :
With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.
What is fractional distillation ? What is the use of fractionating column in fractional distillation ?
The technique which is used to separate particles of a solid suspended in a liquid quickly is called :
Naphthalene can be separated from sand :
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
Define the term matter.
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.
Solid is an arrangement of particles ______.
Gases do not diffuse very easily.
Examples of foam are ______.
Write a scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
