Question

Which of the following is a chemical change?
(a) Melting of ice (b) milk to yogurt
(c) cloud formation (d) None of these​

Answer 1

Answer:

milk to yogurt is a chemical change because it becomes lactic acid from milk by fermentation process

Answer 2

Answer:

Option (b) is correct answer that is conversation of milk to yogurt.

Extra information:The chemical reaction is a process which produces a new substance with new and different physical and chemical properties.

2.It is an inconvertible process.

Facts: Milk is converted to yogurt by process of fermentation.In this process

Bifidobacterium animalis produces ATP molecules which lead to ferment milk.