Advertisements
Advertisements
Question
How will you separate a mixture of iron filings, chalk powder and common salt ?
Advertisements
Solution
We will separate a mixture of iron filings, chalk powder and common salt by using a magnet followed by filtration and evaporation.
First, a magnet is moved on a mixture of iron filings, chalk powder and common salt. In the process, iron filings are separated by the magnet. After that, chalk powder and common salt are mixed in water. Salt dissolves in water but chalk powder does not. So, chalk powder is separated by filtration. On heating the filtrate, all the water is evaporated and salt crystals are left behind.
APPEARS IN
RELATED QUESTIONS
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
Which one is a kind of matter:
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
What are pure substances ? Give two examples of pure substances.
Name two solid, two liquid and two gaseous elements at the room temperature.
Name a metal which forms amalgams.
Which one of the following is not a metalloid ?
How much water should be added to 15 grams of salt to obtain 15 per cent salt 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.
Define solubility of a substance. How does it vary with temperature ?
What do you understand by the statement " the solubility of copper sulphate in water at 20°C is 20.7 g" ?
What difference in the properties of oil and water enable their separation by a separating funnel ?
The technique which is used to separate particles of a solid suspended in a liquid quickly is called :
______ is not made of matter.
The particles in the matter are extremely small and can be seen even with a powerful microscope.
What type of matter glass is?
Define the term matter.
Define the term matter.
