Advertisements
Advertisements
प्रश्न
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
Advertisements
उत्तर
A colloid is a heterogeneous mixture and its components can be separated by the technique known as centrifugation.
APPEARS IN
संबंधित प्रश्न
What are the conditions for 'something' to be called 'matter'?
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
Which type of elements, metals or non-metals, show the property of brittleness ?
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
“Is malleable and ductile” best describes :
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.
- What type of substance could X be ? Name one substance like X.
- What type of substance could Y be ? Name one substance like Y.
- What type of substance could Z be ? Name one substance like Z.
- Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
- Name the three groups into which all the substances like Y are divided on the basis of their properties.
If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.
State whether the following statement is true or false :
Bread is an example of solid foam.
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Which of the following is not an emulsion ?
One of the following does not show Tyndall effect. This one is :
Which of the following can be called a suspension ?
Describe the method of separating a mixture containing common salt, sand and ammonium chloride.
How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?
Explain the meaning of the term ‘matter’.
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
______ is not made of matter.
Stars including Sun are covered in ______.
Compressibility of solids: ______.
