Oxygen is produced during photosynthesis , Jan Ingenhouse’s Hydrilla experiment.10 th class,biology 

Wonderful demo.clear and educating.congrats. Why Hydrilla plant? Because it is free floating submerged hydrophyte.capable of conducting photosynthesis under water and we are performing experiment under water to catch and collect oxygen replacing water in a test tube.

Amazing , i really appreciate the person who has burnt the match stick near the testtube

Good experience with valid demonstration,it's well organised and worthy to observe 👍

Super video sir..vision in the water is so clear......

Wish your videos reach many one sir

Bicarbonate is added to water to increase carbon dioxide content.

Very nice presentation sir, useful 💐💐💐💐

ప్రయోగం చాలా బాగా చేశారు సార్ 👏 థాంక్యూ సార్🤝

Excellent sir..🙏

Excellent.💯💯💯💐💐💐💐👌👌👌👌👌👍👍👍👍👍👍👍👍👍👍

Tried to explain the procedure well. Good

very well done experiment 👍👍

Hill used H2O_18 to realise that oxygen released is from splitting water.

nice presentation sir👏

Experiment super sir

Exalent 👌 but I want to telugu

Well done sir

Super video sir

Was this experiment is good

Nice

Experiment చాలా బాగా చేసారు సార్... Thank you.....

Sir