Question

1. which of the following are mixtures?

a. soda, fruit loops, water
b. granite, co₂, water
c. salt water, soda, juice
d. oxygen, lemonade, dirt water

Explanation:

A mixture is a combination of two or more substances where each substance retains its own chemical properties.

• Option a: Soda is a mixture (carbon - dioxide gas dissolved in a liquid with flavorings etc.), fruit loops are a mixture (different components like cereal pieces with coatings), water is a pure compound ($H_2O$), so this option is incorrect as it has a pure substance (water).
• Option b: Granite is a mixture (of minerals like quartz, feldspar etc.), $CO_2$ is a pure compound, water is a pure compound, so this option is incorrect as it has two pure substances ($CO_2$ and water).
• Option c: Salt water (salt dissolved in water) is a mixture, soda is a mixture, juice (a combination of water, sugars, flavorings etc.) is a mixture. All are mixtures.
• Option d: Oxygen is a pure element, lemonade is a mixture, dirt water is a mixture. Since oxygen is a pure substance, this option is incorrect.

Answer:

C. salt water, soda, juice