Question

From accumulates on a surface of 'dal' kept for a long time in summer

Answer 1

Answer:

Foam gets accumulated on the surface of the dal, this happens due to denaturation of protein at high temperature in summer. Denaturation is a process in which protein molecules loses its structure due to breaking of weak chemical bonds.

Answer 2

1) Dal is rich in proteins.

2) During summer, bacteria attack the dal and cause fermentation resulting in the production of carbon dioxide gas.

3) therefore foam accumulates on the surface of the 'dal' kept for long time in summer.