Advertisements
Advertisements
प्रश्न
Describe a method to separate a mixture of common salt and sand.
Advertisements
उत्तर
Separation of common salt and sand from a mixture involves the processes of filtration, followed by evaporation.
Sand can be separated from a mixture of sand and salt solution (salt dissolved in water) by filtration. After filtration, sand remains on the filter paper as a residue. Common salt can now be obtained from the filtrate by boiling it. Boiling causes all the water to evaporate and salt is left behind. This process is called evaporation.
APPEARS IN
संबंधित प्रश्न
All kinds of matter
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
Describe in your own words, what happens to the particles when salt dissolves in water.
Honey is more viscous than water. Can you suggest why?
Explain why steel is used to make railway lines.
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
The elements which normally exist in the liquid state are :
A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
Define Sol and give one example.
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
How will you separate a mixture of common salt, sulphur powder and sand ?
Explain how, impure copper sulphate can be purified by crystallisation.
Which of the following cannot be separated from air by the process of fractional distillation ?
The best way to recover sugar from an aqueous sugar solution is :
A standard sheet of paper is about ______ of atoms thick
The movement of particles in liquids is ______.
Define the term matter.
