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प्रश्न
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
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उत्तर
We can pound sugar candy into a fine powder. When the powder is fine, it will quickly dissolve in water. Therefore, we can make sherbet quickly.
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 |
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
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.
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
One of the following does not show Tyndall effect. This one is :
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
Compressibility of solids: ______.
Examples of foam are ______.
