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प्रश्न
How will you separate a mixture of iron filings and powdered carbon ?
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उत्तर
We can separate a mixture of iron filings and powdered carbon by using a magnet. The principle behind the separation of iron fillings and powdered carbon is the property of iron to get attracted by magnets. When the magnet is brought close to the mixture, iron fillings are attracted by the magnet and get collected on the surface of the magnet. In the process, powdered carbon is left behind as residue.
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संबंधित प्रश्न
Define the term matter. What is it composed of?
Fill in the blank :
The substances which can flow are called ________
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
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?
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
What happens when the temperature of a saturated sugar solution is increased ?
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
Which of the following can be called a suspension ?
How will you separate a mixture containing sand and sugar ?
Describe a method to separate a mixture of common salt and sand.
How will you separate water from mustard oil ?
Explain how, impure copper sulphate can be purified by crystallisation.
Which of the following mixture cannot be separated by using water as the solvent ?
The dyes present in fountain pen ink can be separated by the technique of :
One of the following does not undergo sublimation. This one is :
Matter is made up of ______.
The physical state of water at 373 K is ______.
