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. ( )

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Solution

1. False
Souring of milk is a chemical change.

2. False
Digestion of food is a chemical change.

3. False
Crystallisation is widely used to obtain a compound in its purest form.

4. True

5. False
Glowing of the filament of a bulb is an example of a physical change.

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Similar questions

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Digestion of food is a Q irreversible change. ( )
2. Rusting of iron is a reversible change. ( )
3. Melting of wax is a reversible change. ( )
4. Curding of milk is an irreversible change. ( )
5. Melting of ice cream is a reversible change. ( )

Q. Match the columns:

	I		II
(a)	Physical change	(i)	Curdling of milk
(b)	Chemical change	(ii)	Demagnetisation of magnets
		(iii)	Digestion of food
		(iv)	Crystallisation of substance
		(v)	Rusting of iron

State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook.

(a) Cutting a log of wood into pieces is a chemical change. (True/False)

(b) Formation of manure from leaves is a physical change.

(True/ False)

(d) Iron and rust are the same substances. (True/False)

(e) Condensation of steam is not a chemical change. (True/False)

State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook.

(a) Cutting a log of wood into pieces is a chemical change.
(b) Formation of manure from leaves is a physical change
(c) Iron pipes coated with zinc do not get rusted easily.
(d) Iron and rust are the same substances.
(e) Condensation of steam is not a chemical change.

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

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1. False Souring of milk is a chemical change. 2. False Digestion of food is a chemical change. 3. False Crystallisation is widely used to obtain a compound in its purest form. 4. True 5. False Glowing of the filament of a bulb is an example of a physical change.

1. False
Souring of milk is a chemical change.

2. False
Digestion of food is a chemical change.

3. False
Crystallisation is widely used to obtain a compound in its purest form.

4. True

5. False
Glowing of the filament of a bulb is an example of a physical change.