Question

When yeast is added to a dough of idli and dosa why does the diugh rise? what chemically reaction takes place?

Answer 1

Answer:

due to anerobic respiration by yeast large amount of co2 is released which rise dough

Explanation:

anerobic respiration is incomplete breakdown of glucose in o2 lack enviroment

Answer 2

Answer:

When yeast is added to a dough of idli and dosa the dough rises. This is because yeast reproduces quickly at a suitable temperature and produces ethanol and carbon dioxide by fermentation of sugar. The carbon dioxide results in making the dough rise.

Fermentation (anaerobic respiration) is the chemical reaction involved in this process.

$C_{6} H_{12} O_{6} --------> 2C_{2} H_{5} OH+ 2CO_{2$

glucose                                   ethanol

Hope It Helps :)