Open App

Class 12 Exam > Class 12 Videos > L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12

L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 Video Lecture

FAQs on L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 Video Lecture

1. How does lowering of vapor pressure affect the boiling point of a liquid?

Ans. When the vapor pressure of a liquid is lowered, it means that the liquid's molecules are less likely to escape into the gas phase. This results in an increase in the boiling point of the liquid. The higher the vapor pressure, the easier it is for the liquid to vaporize, leading to a lower boiling point.

2. Why does adding a non-volatile solute lower the vapor pressure of a solvent?

Ans. Adding a non-volatile solute to a solvent lowers its vapor pressure due to the phenomenon known as Raoult's law. According to this law, the presence of a solute decreases the number of solvent molecules available to escape into the gas phase, thus reducing the overall vapor pressure. This decrease in vapor pressure leads to a lowering of the boiling point of the solvent.

3. How does the concentration of a solute affect the decrease in vapor pressure of a solvent?

Ans. The decrease in vapor pressure of a solvent due to the addition of a solute is directly proportional to the concentration of the solute. As the concentration of the solute increases, more solvent molecules are replaced by solute particles at the surface, resulting in a greater reduction in the number of solvent molecules available to vaporize. Thus, a higher solute concentration leads to a larger decrease in vapor pressure.

4. What is the relationship between lowering of vapor pressure and colligative properties of solutions?

Ans. The lowering of vapor pressure is one of the colligative properties of solutions. Colligative properties depend on the number of solute particles present in a solution, rather than the nature of the solute itself. When a non-volatile solute is added to a solvent, it lowers the vapor pressure of the solvent according to Raoult's law. This decrease in vapor pressure is a colligative property, meaning it depends on the concentration of solute particles rather than their identity.

5. Can the lowering of vapor pressure be reversed?

Ans. The lowering of vapor pressure due to the addition of a non-volatile solute to a solvent is a reversible process. If the solute is removed from the solution, the vapor pressure of the solvent will return to its original value. Similarly, if the concentration of the solute is reduced, the vapor pressure will increase. The reversibility of the lowering of vapor pressure is one of the key characteristics of colligative properties.

Related Exams

Class 12

About this Video

	4.68/5 Rating
	Dec 14, 2024 Last updated

L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 for Class 122024 is part of Class 12 preparation. The notes and questions for L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 have been prepared according to the Class 12 exam syllabus. Information about L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 covers all important topics for Class 122024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12.

Introduction of L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 in English is available as part of our Class 12 preparation & L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 in Hindi for Class 12 courses. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.

Description

Video Lecture & Questions for L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 Video Lecture - Class 12 full syllabus preparation | Free video for Class 12 exam.

Information about L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12

Here you can find the L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 defined & explained in the simplest way possible. Besides explaining types of L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 theory, EduRev gives you an ample number of questions to practice L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 tests, examples and also practice Class 12 tests.

Explore Courses for Class 12 exam

Signup for Free!

Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.

Start learning for Free

10M+ students study on EduRev

ppt

practice quizzes

Sample Paper

past year papers

Viva Questions

L25 : Lowering of Vapor pressure: Numerical - Solutions

Class 12 Video Lecture

Chemistry

Extra Questions

shortcuts and tricks

L25 : Lowering of Vapor pressure: Numerical - Solutions

Free

Semester Notes

Class 12 Video Lecture

Summary

Previous Year Questions with Solutions

Class 12 Video Lecture

mock tests for examination

Exam

Chemistry

Important questions

study material

Objective type Questions

video lectures

Chemistry

pdf

L25 : Lowering of Vapor pressure: Numerical - Solutions

MCQs

;

Study L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 on the App

Students of Class 12 can study L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 alongwith tests & analysis from the EduRev app, which will help them while preparing for their exam. Apart from the L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12, students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc. The EduRev App will make your learning easier as you can access it from anywhere you want. The content of L25 : Lowering of Vapor pressure: Numerical - Solutions, Chemistry, Class 12 is prepared as per the latest Class 12 syllabus.

Education Revolution