Experiments on Gaseous Exchange and Heat Production
Important Questions on Experiments on Gaseous Exchange and Heat Production
Respiration can occur only in light.
Respiration is slower than combustion.
In young roots, the exchange of gases occurs between root hairs and _____ (cells).
Breathing roots are characteristics of plants growing in _____ (humid/ xeric/ marshy) areas.
Given below is an experiment, set up by a candidate, to study the process of respiration in plants. The candidate failed to get the expected results, as two mistakes were made while setting up the experiment.
Write the chemical equation to represent the process of respiration.
Given below is an experiment, set up by a candidate, to study the process of respiration in plants. The candidate failed to get the expected results, as two mistakes were made while setting up the experiment.
What is the purpose of using limewater in flask A and B?
Given below is an experiment, set up by a candidate, to study the process of respiration in plants. The candidate failed to get the expected results, as two mistakes were made while setting up the experiment.
What is the role of soda lime in the experiment?
Given below is an experiment, set up by a candidate, to study the process of respiration in plants. The candidate failed to get the expected results, as two mistakes were made while setting up the experiment.
Identify and state the two mistakes made by candidate.
Two thermoflasks, one containing moist seeds and other containing dry seeds were fitted with thermometers in cotton wool plugs as shown in the diagram. The initial temperature on both the thermometers was noted. After about 48 hours the temperature in flask A was found to be much higher than in flask B.
Why there is no rise in the temperature of flask B?
Two thermoflasks, one containing moist seeds and other containing dry seeds were fitted with thermometers in cotton wool plugs as shown in the diagram. The initial temperature on both the thermometers was noted. After about 48 hours the temperature in flask A was found to be much higher than in flask B.
Explain, why a rise in temperature occurs in flask A?
Two thermos flasks, one containing moist seeds and the other containing dry seeds were fitted with thermometers in cotton wool plugs as shown in the diagram. The initial temperature on both the thermometers was noted. After about 48 hours the temperature in flask A was found to be much higher than in flask B.
State the object of using the apparatus.
Refer to the setup done by a student to investigate anaerobic respiration in yeast cells to answer the following questions.
A student decided to conduct the same experiment. He failed to add the layer of oil in the test tube containing the yeast and glucose mixture. Why would his experiment be inaccurate?
The purpose of the setup was to compare the rate of production of ethanol under different conditions. In which of the following circumstances would the rate of ethanol production be increased?
Which of the following would be expected to give off carbon dioxide?
I. A raw piece of apple.
II. A piece of freshly boiled potato.
III. A mouse.
IV. A mouldy piece of bread.
Name the following.
Oxidative breakdown of food to release energy.
State the role of the following:
Soda lime
State the role of the following:
Limewater
When air blown from mouth into a test tube containing lime water, the lime water turns milky due to the presence of.
What happens to limewater when it comes in contact with ?
Do boiled peas also carry out respiration?
