Which of the following is not a characteristic of mixtures?
A
Mixtures have a specific set of properties
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B
Mixtures contain two or more substances
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C
Mixtures can be heterogeneous or homogeneous
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D
Formation of mixtures does not involve energy change
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Solution
The correct option is A Mixtures have a specific set of properties Two or more pure substances mixed together in any proportion such that they retain their individual characteristics and do not undergo any chemical change are called mixtures. The properties of mixtures are as follows: 1. Mixtures contain two or more substances mixed together without any force acting on them. 2. Mixtures are of two types: heterogeneous and homogeneous. 3. Formation of mixtures does not involve energy change as the individual components retain their properties. 4. Mixtures do have a specific set of properties. They depict the properties of individual components from which they are made.