Advertisements
Advertisements
प्रश्न
Why do we need pure substances?
Advertisements
उत्तर
We need pure substances because of the following reasons:
- A pure substance has a fixed melting and fixed boiling point.
- A pure substance has its characteristic taste, colour, and odour.
- Pure substances can not be broken further into more simple substances by any physical means.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Mixtures can be ________ or _______
Which of the following are homogeneous in nature ?
- ice
- wood
- soil
- air
A mixture of sulphur and carbon disulphide is :
Name the property of any one of the components which can be used for separating the following mixture :
Salt and Camphor
How will you separate a mixture of chalk powder and water?
Give two examples.
Homogeneous mixture
State whether the following statement is true or false. If false write – the correct statement.
Components in a mixture can be separated by physical and chemical methods.
A few drops of ‘Dettol’ when added to water the mixture turns turbid. Why?
How will you separate a mixture containing saw dust, naphthalene and iron filings?
Write scientific reason.
Lemon sherbet has a sweet, sour and salty taste, and it can be poured into a glass.
