Advertisements
Advertisements
प्रश्न
How would you separate iodine from a mixture of iodine and common salt ?
उत्तर
We would separate iodine from a mixture of iodine and common salt by the process of sublimation. In the process, iodine sublimes on heating, whereas salt does not. Salt has a melting point higher than that of iodine. Therefore, a mixture of iodine and sodium chloride can be separated by using a sublimation apparatus, where solid iodine is collected by condensation of the mixture.
APPEARS IN
संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
Describe in your own words, what happens to the particles when salt dissolves in water.
What are the characteristics of matter?
In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?
When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of :
The best evidence for the existence and movement of particles in liquids was provided by :
Name one element, one compound and one mixture.
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Name a metal which forms amalgams.
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
Define solute.
Which of the following are chemical changes and which physical ? Give reason.
- a glass bottle breaking
- coal burning in air
- making a cake
- wool being knitted into a sweater
Name the process you would use to separate a mixture of water and alcohol.
Name the process which can be used to purify an impure sample of copper sulphate.
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 .......................
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Solids do not flow.
Define the term matter.
