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प्रश्न
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
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उत्तर
A heterogeneous mixture of liquid and solid is conveniently separated by centrifugation.
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संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Describe in your own words, what happens to the particles when salt dissolves in water.
Explain why steel is used to make railway lines.
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Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
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- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
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State any two properties for believing that aluminium is a metal.
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is :
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Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... 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.
What is a colloid ? Give two examples of colloids (or colloidal solutions)
The solubility of ammonium chloride in water at various temperatures is given below :
| Temperature | : | 10°C | 20°C | 40°C | 60°C | 80°C |
| Solubility | : | 24 g | 37 g | 41 g | 55 g | 66 g |
What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?
Wipe the board with a duster and then tap the duster against the table. What do you see?
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
Compressibility of solids: ______.
Define the term matter.
