Milk curdles when lemon juice is added. This is:

evaporation

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coagulation

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reversible

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photochemical change

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Solution

The correct option is B coagulation
Coagulation happens when milk curdles, as the pH drops and becomes more acidic, the protein (casein and others) molecules attract one another and become "curdles" floating in a solution of translucent whey. This clumping reaction happens more swiftly at warmer temperatures than it does at cold temperatures.

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Similar questions

(a) What happens when baking soda is added to lemon juice?
(b) Is digestion a chemical change?
[3 MARKS]

Statement 1: When baking soda is added in lemon juice, then a chemical change occurs.

Statement 2: A change in which new substance is formed, is known as a physical change.

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