4. (a) What are miscible and immiscible liquids?
(b) Is it possible to dissolve gases in
water? If yes, give an example.
5. What are the advantages of classification of objects?
Answers
Explanation:
1). The term is most often applied to liquids but also applies to solids and gases. For example, water and ethanol are miscible because they mix in all proportions. By contrast, substances are said to be immiscible if there are certain proportions in which the mixture does not form a solution.
2). Gases can dissolve in water. The dissolving of a gas in water depends on the interaction between the molecules of the gas and the water molecules. The amount of gas that can be dissolved in water depends on the temperature of the water. More gas can dissolve in cold water than in hot water.
5). The advantages of classifying organisms are as follows: (i) Classification facilitates the identification of organisms. (ii) helps to establish the relationship among various groups of organisms. (iii) helps to study the phylogeny and evolutionary history of organisms.
4.(a) Miscible Liquid can be easily dissolved in any other liquids, but Immiscible Liquid do not dissolve in other.
Eg. Water, Ethanol etc. are miscible liquids, while Oil in water is immiscible.
If the liquid is immiscible, you will be able to see a meniscus on the liquid, while for miscible liquids you will not.
(b) Yes it is possible to dissolve gases in water. If the solvent is a liquid, then almost all gases, liquids, and solids can be dissolved. Example oxygen in water; carbon dioxide in water
5. The advantages of classifying organisms are as follows: (i) Classification facilitates the identification of organisms. (ii) helps to establish the relationship among various groups of organisms. (iii) helps to study the phylogeny and evolutionary history of organisms.