Question

Ceng
What does the experiment demonstrate ?
lii] Why level of mercury in test tube B falls after few days?
fuli Which gas is liberated by this process and how can you prove its presence ?
liv] What is a control in this experiment and why?
[B] How would you demonstrate that oxygen is necessary for seeds to germinate?
CS
*****​

Answer 1

hii mate

• An experiment is a procedure carried out to support, refute, or validate a hypothesis. Experiments provide insight into cause-and-effect by demonstrating what outcome occurs when a particular factor is manipulated.
• After few days, the level of mercury falls and the presence of some gas in the test tube can be detected. ...
• The gas present in the test tube will be absorbed and the level of mercury will again rise showing that the gas was CO2. Hence, we can prove that germinating seeds respire even in the total absence of air.

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