Find the odd one out.
Find the odd one out.
The correct option is B Boiling water
The explanation for the correct option:
- Physical change: A type of change in which the chemical composition of the substance remains the same. A physical change is a reversible change, the original substance can be brought back by reversing the process. For example, melting of ice, and evaporation of water.
(B) Boiling water: Boiling of water is a physical, reversible change. By lowering the temperature, water vapor can be condensed back into liquid water.
The explanation for the incorrect option:
- Chemical changes: A change in which the chemical composition of a substance changes and a new substance is formed is known as chemical change. For example, rusting of iron.
(A) Curdling of milk: Curdling of milk is a chemical change because milk is converted into curd by the process of fermentation. Since fermentation is an irreversible change in which a new substance is formed with different chemical properties.
(C) Baking bread: Baking of bread is a chemical change. Yeast consumes sugar from the dough, converting sugar into carbon dioxide () and ethanol () This is a chemical and irreversible change.
(D) Frying chips: Cooking and frying causes a chemical change in the food and leads to the formation of a new substance. Such processes are irreversible changes and food cannot be converted back to its raw forms.
Thus, option (B), i.e., boiling water, is the odd one out.
Boiling water
The explanation for the correct option:
- Physical change: A type of change in which the chemical composition of the substance remains the same. A physical change is a reversible change, the original substance can be brought back by reversing the process. For example, melting of ice, and evaporation of water.
(B) Boiling water: Boiling of water is a physical, reversible change. By lowering the temperature, water vapor can be condensed back into liquid water.
The explanation for the incorrect option:
- Chemical changes: A change in which the chemical composition of a substance changes and a new substance is formed is known as chemical change. For example, rusting of iron.
(A) Curdling of milk: Curdling of milk is a chemical change because milk is converted into curd by the process of fermentation. Since fermentation is an irreversible change in which a new substance is formed with different chemical properties.
(C) Baking bread: Baking of bread is a chemical change. Yeast consumes sugar from the dough, converting sugar into carbon dioxide () and ethanol () This is a chemical and irreversible change.
(D) Frying chips: Cooking and frying causes a chemical change in the food and leads to the formation of a new substance. Such processes are irreversible changes and food cannot be converted back to its raw forms.
Thus, option (B), i.e., boiling water, is the odd one out.
