Observe the set up given in Fig.2.2 and answer the following questions.

(a) What happens to the sugar solution in A?

(b) Which gas is released in A?

(c) What changes will you observe in B when the released gas passes through it?

a) The sugar solution present in flask A due to the action of yeast gets converted into ethanol and carbon dioxide. This process is called fermentation.

b) Carbon dioxide gas is released in flask A.

c) The lime water present in test tube B turns milky due to the production of carbon dioxide gas in flask A which passes through the delivery tube into lime water present in a test tube and makes it milky.