කර්මාන්ත රසායනය - නයිට්‍රික් අම්ල නිෂ්පාදනය | KSiri Withanage - Chemistry

[@mithrarathnapasindu5911]

when u teach about chemicals,we feel some taste in our mind and in the tongue too...dear sir.

[@scienceanuradhaperera8968]

🙏🙏🙏

[@kavindyakulatungakulatunga8325]

Thank you sir

[@wmwm4949]

Thanks sir 😉✌️✌️👍

[@chanukatharindu4422]

Thank you sir.

[@darshanachaturange]

Thank you sir