11th Standard Syllabus & Materials

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11th Standard English Medium Chemistry Subject Solutions Creative 3 Mark Questions with Solution Part - II

Published on: 25/06/2021

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Std: 11th Standard - Chemistry

chapter: - Creative Questions

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Questions:

Generic 3

5 x 3 = 15

What are the advantages of standard solution.

How will you prepare a standard solution ?

What are solid solution ? Give example.

What are liquid solutions ? Explain with example.

What are gaseous solution ? Give its various types with example.

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Answers Key:

Generic 3

5 x 3 = 15

1. The error due to weighing the solute can be minimised by using concentrated stock solution that requires large quantities of solute.
2. We can prepare working standards of different concentrations by diluting the stock solution which is more efficient since consistency is maintained.
3. Some of the concentrated solutions are more stable and are less likely to support microbial growth than working standards used in the experiments.

1. A standard solution or a stock solution is a solution whose concentration is accurately known.
2. A standard solution of required concentration can be prepared by dissolving a required amount of a solute in a suitable amount of solvent.
3. It is done by transforming a known amount of solute to a standard flask of definite volume. A small amount of water is added to the flask and shaken well to dissolve the salt.
4.Then water is added to the flask to bring the solution level to the mark indicated at the top end of the flask.
5. The flask is stoppered and shaken well to make concentration uniform.

	Solute	Solvent	Example
1.	Gas	Solid	Solution of H₂, in palladium
2.	Liquid	Solid	Amalgam of potassium
3.	Solid	Solid	Gold alloy

	Solute	Solvent	Example
1.	Gas	Liquid	Carbonated water
2.	Liquid	Liquid	Ethanol dissolved in water
3.	Solid	Liquid	Salt water

Gaseous solution:

1.	Solute	Gas	Example: Air, (A mixture of N₂, O₂ and other gases)
	Solvent	Gas	Example: Air, (A mixture of N₂, O₂ and other gases)
2.	Solute	Liquid	Example: Humid oxygen
	Solvent	Gas	Example: Humid oxygen
3.	Solute	Solid	Example: Camphor in nitrogen gas
	Solvent	Gas	Example: Camphor in nitrogen gas