The apparatus shown in the given diagram is Garreau's potometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. Before keeping the leaf in between, the cups were closed with corks through which two mercury manometers were connected. After few hours, CaCl2 vials were taken out and weighed again.(a) What is the purpose of keeping CaCl2 vials inside the cup?(b) After few hours CaCl2 vials were taken out and weighed again. Will you expect any difference in weight? If so, give reason.(c) What was the purpose of using a manometer?(d) What do you mean by transpiration? [5 MARKS]

The apparatus shown in the given diagram is Garreau's potometer design

1.	The apparatus shown in the given diagram is Garreau's potometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. Before keeping the leaf in between, the cups were closed with corks through which two mercury manometers were connected. After few hours, CaCl2 vials were taken out and weighed again.(a) What is the purpose of keeping CaCl2 vials inside the cup?(b) After few hours CaCl2 vials were taken out and weighed again. Will you expect any difference in weight? If so, give reason.(c) What was the purpose of using a manometer?(d) What do you mean by transpiration? [5 MARKS]
Answer» The apparatus shown in the given diagram is Garreau's potometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. Before keeping the leaf in between, the cups were closed with corks through which two mercury manometers were connected. After few hours, CaCl2 vials were taken out and weighed again. (a) What is the purpose of keeping CaCl2 vials inside the cup? (b) After few hours CaCl2 vials were taken out and weighed again. Will you expect any difference in weight? If so, give reason. (c) What was the purpose of using a manometer? (d) What do you mean by transpiration? [5 MARKS]