Question

1. Define the following:
(a) Seperation of mixture of colours.
(b) Seperation of sugar dissolved in water.
(c) Seperation of Mercury from Mercuric oxide.
2. What do you observe when, naphthalene balls are kept in an enclosed almirah?
3. Name a homogeneous mixture of gaseous compounds.
4. State the use of a fractionating column.
5. How is a mixture and compound different, in terms of energy transformation?




Answer all these questions correctly in one order, I will mark you as a brainlist. ❤❤❤❤❤​

Answer 1

Answer:

1.a

This technique of separating colors is called chromatography. As the water soluble black ink dissolves in the water and moves in between the fibers of the paper, it is separated into bands of color. Different colors get carried faster and farther than others because some molecules are bigger and heavier than others.

1.b

The mixture of sugar-salt solution can be separated by evaporation. If the water is completely evaporated we will get separated sugar from the mixture. If we dissolve the mixture in alcohol we will get the salt separated while sugar will be dissolved in alcohol

1.cwe can separate mercury from mercuric oxide by strong heating inside a test-tube

answer 2

In this reaction chemical change occurred. Naphthalene balls undergo sublimation due to which it converts directly into vapours and disappear into air without leaving any solid.

answer 3

One example of a mixture is air. Air is a homogeneous mixture of the gaseous substances nitrogen, oxygen, and smaller amounts of other substances. Salt, sugar, and many other substances dissolve in water to form homogeneous mixtures

answer 4

A laboratory fractionating column is a piece of glassware used to separate vaporized mixtures of liquid compounds with close volatility. ... Fractionating columns help to separate the mixture by allowing the mixed vapors to cool, condense, and vaporize again in accordance with Raoult's law