An age-old method of separating chaff from grains is
Important Questions on Separation of Substances
Take two beakers A and B. Mix sand and water in beaker A. Mix salt and water in beaker B. Filter both these mixtures separately by using a filter paper or a piece of newspaper.
Which container has a water-soluble substance?
Take two beakers A and B. Mix sand and water in beaker A. Mix salt and water in beaker B. Filter both these mixtures separately by using filter paper or a piece of newspaper.
In which case are you not able to separate what has been mixed?
Take two beakers A and B. Mix sand and water in beaker A. Mix salt and water in beaker B. Filter both these mixtures separately by using a filter paper or a piece of newspaper.
Does filtration separate substances dissolved in the water?
Take a handful of soil and mix it in half a bucket of water. Stir the mixture vigorously. After about a minute or two, fill equal amount of this water in four beakers A, B, C and D.
Add half a teaspoon of salt to A, alum powder to B and talcum powder to C. Let D have only the mixture of soil and water.
Stir the contents in each beaker using separate spoons.
In which of the beakers do the soil particles settle at the bottom quickly?
Take a handful of soil and mix it in half a bucket of water. Stir the mixture vigorously. After about a minute or two, fill equal amount of this water in four beakers A, B, C and D. Add half a teaspoon of salt to A, alum powder to B and talcum powder to C. Let D have only the mixture of soil and water.
Stir the contents in each beaker using separate spoons.
Which of the above substance can be used to clean muddy water?
A. Add a teaspoon of salt to half a beaker of water.
Transfer the mixture into a dish and let the water evaporate.
B. Similarly, make a mixture of alum and water.
Let the water evaporate.
What remains in dishes 'A' and 'B' when the water evaporates completely?
A. Add a teaspoon of salt to half a beaker of water.
Transfer the mixture into a dish and let the water evaporate.
B. Similarly, make a mixture of alum and water.
Let the water evaporate.
Were you able to recover all the salt from A and B that was dissolved in the water?
