9th Chapter-5-Chemistry:https://www.youtube.com/watch?v=9NCTVlS14hA&list=PLq1BiBK6vDHftZnnt2GBRjN5-IZV4eQHm

9th-Math-Ch3:https://www.youtube.com/watch?v=8s1uwvN9BwQ&list=PLq1BiBK6vDHfz7osB-FMmjT4azPHpRlkO

9th-Chap-3rd Physics:https://www.youtube.com/watch?v=cNZyLaU90MI&list=PLq1BiBK6vDHdikCEgcxxvOfBSP0GYfQbi

Non-Polar Covlent bond: https://youtu.be/Rukl-hLdUM0

Metalic Bond:https://youtu.be/jDuWgMD6y

Ionic Bond:https://youtu.be/UncFpn6E8

Covelant Bond:https://youtu.be/3nheAZUCg24

4.2 Double Covlent Bond:https://youtu.be/3nheAZUCg24

4.2 Dative covlent Bond:https:https://youtu.be/eqyU1A0v1LQ

4.2 Covlent Bond:https://youtu.be/t03xCuGIzDI

4.2 Chemical Bond:https://youtu.be/kKUpXrW4tg8

4.2 Why Do Atom Form C-Bond:https://youtu.be/kKUpXrW4tg8

4.2 Polar Bond:https://youtu.be/76DVqrM0J58

Single Cov-Bond:https://youtu.be/qLWEJ1fKKxI

Triple Cov-Bond:https://youtu.be/zp-KFhkvPGs

Types of Cov-Bond:https://youtu.be/Y-5anfWle5c