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Physical and Chemical Changes

Formation of ...

Question

Formation of curd from milk is a physical change.

A

True

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B

False

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Solution

The correct option is B
False

Formation of curd from milk changes the chemical composition of milk. This change is carried out by bacteria known as lactobacillus. Since the chemical composition is changed therefore it's a chemical change and hence the given statement is false.

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Similar questions

Q. Formation of curd from milk is the example of
(a) slow
(b) chemical change
(c) periodic change
(d) physical change

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Souring of milk is a physical change. ( )
2. Digestion of food is a physical change. ( )
3. Crystallisation is widely used to prevent rusting. ( )
4. Formation of steam from water on heating is a physical change. ( )
5. Glowing of the filament of a bulb is an example of a chemical change. ( )

Q. Classify the following as physical or chemical changes :
(i) Formation of curd from milk
(ii) Condensation of steam
(iii) Growth of a plant
(iv) Breaking of a glass tumbler

Q. Classify the following into slow and fast changes:
(i) Spinning of top
(ii) Formation of day and night
(iii) Formation of curd from milk
(iv) Change of season
(v) Making curd from milk by adding lemon juice.

Q. Question 2(b)
State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook.
Formation of manure from leaves is a physical change.

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