In the given experiment, a little amount of warm sugar solution and lime water are taken in containers A & B respectively. Then active yeast is added to container A. Then we see the inflated balloon. After transfering the balloon from container A to container B some changes will be observed in the container B. (a) Which biological process does this experiment display? (b) Mention the chemical formula of the products obtained after the experiment. (c) What change will be observed in container B after transfering the balloon?
Answers
What happened when the sugar flour and water were mixed and sealed in the bottle?
As the yeast eats the sugar, it releases a gas called carbon dioxide. The gas fills the bottle and then fills the balloon as more gas is created. ... Each bit of yeast makes tiny gas bubbles and that puts millions of bubbles (holes) in our bread before it gets baked.
(a) Fermentation
(b) CaCO₃
(c) Milky white solution.
Explanation:
(a)When yeast is added to container A containing warm sugar solution, fermentation occurs. In fermentation, sugar (glucose) is broken down into alcohol, CO₂, and energy is produced.
Thus, this experiment displays fermentation.
Glucose → Alcohol + CO₂ + Energy
This CO₂ gas inflates the balloon.
(b)When this CO₂ gas is passed through container B containing lime water, CO₂ reacts with Ca(OH)₂ (lime water) to form a milky-white precipitate of calcium carbonate.
Thus, a compound with the chemical formula CaCO₃ is produced.
(c)This reaction could be given as:
Ca(OH)₂ + CO₂ → CaCO₃↓ + H₂O
This calcium carbonate gives a milky white appearance to the solution.
Thus, after transferring the balloon to container B, the solution will turn milky white.