Скачать или смотреть Class 7 Science || Chapter 4 Role of Substances in Environment || Best Bengali Explanation || wbbse

In this video, we cover Class 7 WBBSE Science Chapter 4 – "Role of Substances in Environment" with line-by-line explanation in Bengali.
🔹 Each part of the chapter is explained in a simple and clear way for better understanding.
🔹 All the important questions and answers are discussed in detail.
🔹 Key exam-focused topics are highlighted separately.

👉 Watching this video will help you prepare well for your exams and understand the chapter completely.


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✅ What’s included in the video:

Role and importance of substances in the environment

Easy Bengali explanation of the chapter

Detailed discussion of important exam questions

Study tips for better preparation



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