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प्रश्न
The technique which is used to separate particles of a solid suspended in a liquid quickly is called :
पर्याय
decantation
centrifugation
sedimentation
filtration
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उत्तर
centrifugation
Centrifugation is a process, in which suspended particles are separated from the solvent. In this process, the solution is rotated at a high rate in a centrifuge thereby separating the solute particles and the solvent.
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संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
Fill in the blank :
The substances which can flow are called ________
State two characteristics of matter demonstrated by Brownian motion.
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
What elements do the following compounds contain ?
Sugar, Common salt
Name a metal which has no fixed shape.
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.
Define solvent.
In what respects does a true solution differ from a colloidal solution ?
What is meant by the concentration of a solution ?
Which of the following do not exhibit Tyndall effect ?
Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Matter is made up of ______.
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
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The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
The most reactive metal is ______.
A teabag placed in a cup of hot water will diffuse into the water.
Higher the temperature, the higher the kinetic energy of particles.
