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प्रश्न
Define solvent.
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उत्तर
Solvent is a liquid or a medium in which the solute is dissolved.
Example: Water
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संबंधित प्रश्न
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
Gases have definite volume but no definite shape.
Fill in the blank :
The substances which can flow are called ________
What are the characteristics of matter?
What is meant by saying that metals are sonorous ?
What is meant by saying that metals are lustrous ?
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
The three important metalloids are.............................. and ..........................
You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound ?
Name a non-metal :
- which is lustrous
- which is required for combustion
- whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
- other than carbon which shows allotropy
- which is known to form the largest number of compounds
“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.
What happens when the temperature of a saturated sugar solution is increased ?
Define Sol and give one example.
Define the emulsion. Give one example.
Milk of Magnesia is :
Which of the following can be called a suspension ?
Name the process which is used in milk dairies to separate cream from milk.
How will you separate camphor, common salt and iron nails from their mixture ?
Define the term matter.
