Advertisements
Advertisements
Question
How would you separate iodine from a mixture of iodine and common salt ?
Advertisements
Solution
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
RELATED QUESTIONS
The smallest unit of matter that exists freely in nature is called ...........
State two characteristics of matter demonstrated by Brownian motion.
What is meant by saying that non-metals are brittle ?
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
What are the two types of pure substances? Give one example of each type.
State two physical properties on the basis of which metals can be distinguished from non-metals.
Name a non-metal :
- which is lustrous
- which is required for combustion
- whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
- other than carbon which shows allotropy
- which is known to form the largest number of compounds
What are the three general classes of matter ? Give one example of each type.
The element which is not common between the compounds called baking soda and soda ash is
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
How will you differentiate between a suspension and a colloid ?
Which of the following will show Tyndall effect ? Why ?
- Salt solution
- Starch solution
- Milk
- Copper sulphate solution
What is meant by the concentration of a solution ?
Which of the following do not exhibit Tyndall effect ?
Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.
How would you prepare a saturated solution of sodium chloride in water at 25°C ? What will happen if this solution is cooled to 10°C ?
The solubility of ammonium chloride in water at various temperatures is given below :
| Temperature | : | 10°C | 20°C | 40°C | 60°C | 80°C |
| Solubility | : | 24 g | 37 g | 41 g | 55 g | 66 g |
What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
How will you separate water from mustard oil ?
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
Evaporation does form bubbles.
