- c) A combination of two or more substances that retain their individual properties.
- b) A combination of two or more substances in which each substance keeps its own chemical identity.
- b) Air
- b) A mixture where the different components are easily distinguishable.
- c) Mixtures can be separated by physical means.
1. What is the correct definition of a mixture?
a) A substance comprising two or more elements chemically bonded together.
b) A chemical combination of two or more substances.
c) A combination of two or more substances that retain their individual properties.
d) A substance consisting of only one type of atom..
2. Which of the following best describes a mixture?
a) A pure substance with a fixed composition.
b) A combination of two or more substances in which each substance keeps its own chemical identity.
c) A new substance formed by a chemical reaction between two or more components.
d) A single element with unique properties.
3. Which of the following is an example of a homogeneous mixture?
a) Oil and water
b) Air
c) Salad
d) Sand and iron filings
4. Which of the following best describes a heterogeneous mixture?
a) A mixture where the composition is uniform throughout.
b) A mixture where the different components are easily distinguishable.
c) A mixture made up of only one element.
d) A mixture where the components cannot be separated physically.
5. Which of the following statements about mixtures is true?
a) Mixtures always contain two elements that are chemically bonded.
b) The properties of a mixture are always different from its components.
c) Mixtures can be separated by physical means.
d) All mixtures have a fixed composition.
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1 answer