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 ...........
Differentiate between an atom and a molecule.
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Honey is more viscous than water. Can you suggest why?
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
Give reason why graphite is used for making elecrode in a dry cell.
The element which is not common between the compounds called baking soda and soda ash is
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.
- What type of substance could X be ? Name one substance like X.
- What type of substance could Y be ? Name one substance like Y.
- What type of substance could Z be ? Name one substance like Z.
- Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
- Name the three groups into which all the substances like Y are divided on the basis of their properties.
What happens when the temperature of a saturated sugar solution is increased ?
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.
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
What is meant by a solution?
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
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 .......................
Describe a method to separate a mixture of camphor and sand.
Which method is better for recovering sugar from sugar solution : evaporation or crystallisation ? Give reason
for your answer.
What is chromatography ? State its two applications.
Define the term matter.
