Question

Puja mother kneaded the flour at night
and forgot to keep it in this fridge.
the dough Are these changes physical

or chemical​

Answer 1

Answer:

chemical change because it will change its taste

Answer 2

It is kind of chemical change

Explanation:

• We can not completely classify it as chemical change because it does not involve any change in the composition of the matter but it does involve some reactions.

• Dough or kneaded flour gets spoiled due to the bacterial growth. When Puja's mother forgot to put it in fridge. The raised temperature provided favorable conditions for bacterial growth.

• Yeast produced carbon dioxided which caused the smell and rising of  dough

• There are also lactic acid bacteria which produced acids and impart the sour taste to the flour

• Thus, chemical reactions are involved in spoiling of dough