Advertisements
Advertisements
प्रश्न
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
Advertisements
उत्तर
We would obtain sodium chloride from a mixture of sodium chloride and sulphur by using carbon disulphide as a solvent instead of water. Sulphur is soluble in carbon disulphide, whereas sodium chloride is not. So, we can mix sulphur and sodium chloride in carbon disulphide as all the sulphur will get dissolved and sodium chloride will remain insoluble. Then, sodium chloride can be obtained from the mixture by filtration, where it would be obtained as a residue.
APPEARS IN
संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
Fill in the blank :
The substances which can flow are called ________
A kind of matter which can sublime is
What is the scientific name of particles which make up mater?
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
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 :
Name a metal which is soft and a non-metal which is hard.
Name the property which allows metals to be hammered into thin sheets.
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
What is the other name for impure substances ? Give two examples of impure substances.
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
Name two solid, two liquid and two gaseous elements at the room temperature.
Explain why, hydrogen and oxygen are considered elements whereas water is not considered an element.
Give reason why graphite is used for making elecrode in a dry cell.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
From what substance has the potter made all the things?
Which statement is not correct for a mixture
