PLEASE ANSWER ASAP!!! (a) What process does the experiment demonstrate? (b) Ihy did the level of liquid in the vertical tube rise? (C) Name the liquids 1 and 2 shown in the figure.
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a. Potassium hydroxide is kept in the test tubes X and Y because it reacts chemically with the carbon dioxide and absorbs it to form a precipitate.
b. The coloured water rises in tube 1 due to the development of a partial vacuum inside it. This happens because the carbon-dioxide released by the germinating seeds will be soaked by potassium hydroxide present in the flask containing those seeds. This soaking of CO
2
will develop partial vacuum which sucks the water up and hence the water level rises.
c. The boiled peas soaked in a disinfectant in test tube Y are used as a control. In this test tube, the process of respiration will not take place as the peas are boiled while in test tube X, the process of respiration will take place.
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(a) Hydrotropism
(b) A partial vacuum on one end of a tube with the other in water open to atmospheric pressure will lift water into the tube because the vacuum pressure in the tube is lower than atmospheric pressure. The greater the vacuum (the lower the air pressure) in the tube the higher the water will rise in the tube
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