Advertisements
Advertisements
Question
What is fractional distillation ? What is the use of fractionating column in fractional distillation ?
Advertisements
Solution
Fractional distillation is a process of separating two or more miscible liquids by distillation. The distillate is collected in fractions, which boil at different temperatures. The principle behind this technique is the difference in boiling points of the liquids in the mixture.
The fractionating column is fitted in the neck of the distillation flask. Fractionating column provides different temperature zones inside the flask. The highest temperature is at the bottom and the lowest temperature is near its top.
APPEARS IN
RELATED QUESTIONS
Name the processes involved in two cases.
Define matter.
What is the scientific name of particles which make up mater?
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
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 :
What are the two types of pure substances? Give one example of each type.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
Choose the correct answer.
A 15% alcohol solution means :
In what respects does a true solution differ from a colloidal solution ?
Define Sol and give one example.
Milk of Magnesia is :
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
How will you separate a mixture of iron filings and powdered carbon ?
Naphthalene can be separated from sand :
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
Explain the meaning of the term ‘matter’.
Atoms or groups of atoms having a charge are called ______.
