Advertisements
Advertisements
प्रश्न
Name the process by which common salt is purified.
उत्तर
Common salt is purified by the process of crystallization.
APPEARS IN
संबंधित प्रश्न
Name the processes involved in two cases.
What are the two conditions for the interconversion of states of matter ?
Explain why air is used to inflate tyres.
What are the characteristics of matter?
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
The three important metalloids are.............................. and ..........................
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
Give reason why copper metal is used for making electric wires.
You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound ?
“Is malleable and ductile” best describes :
What is a colloid ? Give two examples of colloids (or colloidal solutions)
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
Name the process by which all the dye can be recovered from black ink.
Fill in the following blanks with suitable words :
The separation of liquids by fractional distillation is based on the difference in their .....................
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
How would you separate iodine from a mixture of iodine and common salt ?
The dyes present in fountain pen ink can be separated by the technique of :
There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when, liquids B and C are mixed, they form two separate layers :
(a) Which process will you use to separate a mixture of A and B ?
(b) Which method will you use to separate a mixture of B and C ?
(c) Name the liquids which would behave like (i) A (ii) B and (iii) C.
Explain the meaning of the term matter with special reference to the term ‘substance’.
Give some examples of the Tyndall effect observed in your surroundings?
