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Mind mapping is a way /tool , which helps to memorize information by representing any information visually. This helps the students for to remember and revise the important points of any chapter. I always suggest students to prepare mind map for each chapter.
Each can follow , different methods of preparing mind map. There are certain guidelines you can use. I follow methods given by Tony Buzan.
Here is the mind map for CBSE 10- Chemistry Chapter , Chemical Reactions. This is the mind map , I have drawn. You can draw mind map which will help you to remember and revise the chapter. Use colors and diagrams.
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Hope this will help you to guide to prepare your own mind map.
Lets grow together intellectually,
-Ranjana