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प्रश्न
Name the process by which all the dye can be recovered from black ink.
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उत्तर
The process of evaporation can be used to recover all the dye from black ink.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Liquids have definite shape and definite volume.
Name the terms for the change of vapour into a liquid.
Which one is a kind of matter:
Explain why air is used to inflate tyres.
What are the characteristics of matter?
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
Name a non-metal which is a good conductor of electricity.
Name a metal which can be easily cut with a knife.
What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is :
Out of a colloid, solution and a suspension :
which one has the largest particles ?
State whether the following statement is true or false :
Sponge is an example of solid sol.
What is the effect of temperature on the solubility of solids in liquids ?
Milk of Magnesia is :
What is the difference between colloids and suspensions ?
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
The movement of particles in liquids is ______.
A teabag placed in a cup of hot water will diffuse into the water.
