NEET Exam > NEET Videos > Chemistry Class 12 > Methods of Preparation of Colloids
Methods of Preparation of Colloids Video Lecture | Chemistry Class 12 - NEET
|
108 videos|286 docs|123 tests
|
FAQs on Methods of Preparation of Colloids Video Lecture - Chemistry Class 12 - NEET
| 1. What are the different methods of preparation of colloids? |  |
Ans. There are several methods of preparing colloids, including:
- Dispersion method: This involves breaking down larger particles into colloidal particles by methods such as grinding, milling, or ultrasonication.
- Condensation method: In this method, small colloidal particles are formed by the condensation of larger molecules or ions.
- Chemical method: Colloids can be prepared by chemical reactions, where reactants are selected to yield colloidal particles.
- Electrolytic method: Colloids can be formed by the electrolysis of certain electrolytes.
- Mechanical method: This method involves the shearing of larger particles to form colloidal particles.
| 2. How does the dispersion method work for the preparation of colloids? | |
Ans. The dispersion method involves reducing the size of larger particles to colloidal size. This can be achieved by various techniques such as grinding, milling, or ultrasonication. In grinding, a solid material is ground down using a mortar and pestle or a ball mill to create smaller particles. Milling involves using a milling machine or a colloid mill to break down larger particles. Ultrasonication uses high-frequency sound waves to break down particles into smaller sizes. These methods help in achieving a colloidal dispersion by reducing the particle size to the required range.
| 3. Can you provide an example of the condensation method for preparing colloids? | |
Ans. One example of the condensation method for preparing colloids is the formation of colloidal gold. In this method, gold chloride is reduced by adding a reducing agent, such as sodium citrate or sodium borohydride, to form small gold nanoparticles. These nanoparticles then condense further to form larger colloidal particles. The size of the particles can be controlled by adjusting the concentration of the reducing agent and reaction conditions. This method is widely used in industries for the preparation of gold colloids used in various applications such as catalysis, electronics, and medicine.
| 4. How does the chemical method work for the preparation of colloids? | |
Ans. The chemical method involves the formation of colloidal particles through a chemical reaction. This method relies on the selection of reactants that can yield colloidal particles. For example, the reaction between a metal salt and a reducing agent can result in the formation of metal nanoparticles. Similarly, the reaction between an acid and a base can produce colloidal particles called sols. The chemical method allows for precise control over the size, shape, and composition of the colloidal particles by adjusting the reaction conditions and reactant concentrations.
| 5. What is the electrolytic method for the preparation of colloids? | |
Ans. The electrolytic method involves the electrolysis of certain electrolytes to form colloidal particles. Electrolytes are substances that dissociate into ions when dissolved in water. By passing an electric current through the electrolyte solution, ions can migrate towards the electrodes and undergo specific reactions to form colloidal particles. For example, the electrolysis of silver nitrate solution can produce colloidal silver particles. The electrolytic method offers a way to prepare colloids with precise control over their size and stability.
About this Video
|
1.2K Views |
|
4.98/5 Rating |
|
Nov 24, 2024 Last updated |
Video Description: Methods of Preparation of Colloids for NEET 2024 is part of Chemistry Class 12 preparation.
The notes and questions for Methods of Preparation of Colloids have been prepared according to the NEET exam syllabus.
Information about Methods of Preparation of Colloids covers all important topics for NEET 2024 Exam.
Find important definitions, questions, notes, meanings, examples, exercises and tests below for Methods of Preparation of Colloids.
Introduction of Methods of Preparation of Colloids in English is available as part of our Chemistry Class 12 for NEET & Methods of Preparation of Colloids in
Hindi for Chemistry Class 12 course. Download more important topics related with notes, lectures and mock test series for
NEET Exam by signing up for free.
Description
Video Lecture & Questions for Methods of Preparation of Colloids Video Lecture | Chemistry Class 12 - NEET - NEET full syllabus preparation | Free video for NEET exam to prepare for Chemistry Class 12.
Information about Methods of Preparation of Colloids
Here you can find the meaning of Methods of Preparation of Colloids defined & explained in the simplest way possible.
Besides explaining types of Methods of Preparation of Colloids theory, EduRev gives you an ample number of questions to practice Methods of Preparation of Colloids tests,
examples and also practice NEET tests.
|
108 videos|286 docs|123 tests
|
|
Explore Courses for NEET exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
shortcuts and tricks
,Semester Notes
,Extra Questions
,Important questions
,study material
,Summary
,practice quizzes
,video lectures
,Methods of Preparation of Colloids Video Lecture | Chemistry Class 12 - NEET
,mock tests for examination
,Free
,Viva Questions
,MCQs
,Methods of Preparation of Colloids Video Lecture | Chemistry Class 12 - NEET
,Previous Year Questions with Solutions
,Exam
,Methods of Preparation of Colloids Video Lecture | Chemistry Class 12 - NEET
,ppt
,Objective type Questions
,past year papers
,Sample Paper
;
Study Methods of Preparation of Colloids on the App
Students of NEET can study Methods of Preparation of Colloids alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Methods of Preparation of Colloids,
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 Methods of Preparation of Colloids is prepared as per the latest NEET syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup