Question

Which of the following is a characteristic of both mixtures and compounds?

• A. They contain components in fixed proportions.
• B. Their properties are the same as those of their components.
• C. Their weight equals the sum of the weights of their components.
• D. Energy is given out when they are made.

Answer 1

Answer: (C)

Their weight equals the sum of the weights of their components.

Mixtures and compounds both follow the law of conservation of mass, so their weight equals the sum of the weights of their components.

A compound is formed as a result of the chemical reaction between the constituent elements. But it's properties do not remain the same as those of its elements.

For a mixture, the components are not present in fixed proportions. Moreover, energy is not given out when it is made.

Only option 'C' applies to both mixtures and compounds.