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प्रश्न
Name the process which can be used to purify an impure sample of copper sulphate.
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उत्तर
An impure sample of copper sulphate can be purified by the process of crystallization.
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संबंधित प्रश्न
Solids have definite shape and definite volume.
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Name a metal which is soft and a non-metal which is hard.
Name one element, one compound and one mixture.
What are the two types of pure substances? Give one example of each type.
Name two solid, two liquid and two gaseous elements at the room temperature.
Give reason why graphite is used for making elecrode in a dry cell.
What are the three general classes of matter ? Give one example of each type.
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
Explain what happens when a beam of light is passed through a colloidal solution.
Define Sol and give one example.
What is meant by a solution?
Which of the following is not an emulsion ?
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 ?
What is chromatography ? State its two applications.
Explain the meaning of the term ‘matter’.
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
Define the term matter.
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
