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प्रश्न
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
उत्तर
If a mixture contains iron fillings as one of the constituents, it can be separated by using a magnet.
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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 |
What are the two types of pure substances? Give one example of each type.
Give reason why graphite is used for making elecrode in a dry cell.
Name a metal which forms amalgams.
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
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
How will you test whether a given solution is a colloidal solution ?
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
Which of the following represents the solubility of sugar in water at 20°C ?
What is the general name of the process by which tea-leaves are separated from prepared tea ?
Fill in the following blanks with suitable words :
The separation of liquids by fractional distillation is based on the difference in their .....................
Write a method to separate a mixture of sand and potash alum.
Matter is made up of ______.
Rusting of an article made up of iron is called
Give an example of a molecule.
Define the term matter.
Define the term matter.
