Practice Mechanical Mixture in Chemistry
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A mixture in which the individual components are visibly distinguishable and not uniformly distributed throughout the sample, meaning different regions of the mixture have different compositions and appearances (also called a heterogeneous mixture).
You can see the different parts. A salad, trail mix, or sand in water — the ingredients don't blend together evenly.
Showing a random 20 of 50 problems.
Example 1
easyIs muddy river water a mechanical mixture?
Example 2
easyIs a glass of clear lemonade (sugar, lemon juice, water all dissolved, no pulp) a mechanical mixture?
Example 3
easyIs a jar of mixed jelly beans a mechanical mixture?
Example 4
easyIs a bowl of mixed Lego bricks a mechanical mixture?
Example 5
mediumItalian salad dressing separates into oil and vinegar layers when it sits. What does this tell you about its classification?
Example 6
mediumExplain why soil is considered a mechanical mixture rather than a pure substance or a solution.
Example 7
mediumSmoke is tiny solid soot particles dispersed in air. Is it a mechanical mixture?
Example 8
mediumMilk looks uniform to the eye but under a microscope shows fat droplets dispersed in water. Mechanical mixture or homogeneous? Explain.
Example 9
mediumList two physical methods to separate a mechanical mixture of iron filings and sand.
Example 10
easyIs a bowl of cereal in milk a mechanical mixture?
Example 11
mediumA bottle of fresh-squeezed juice with visible pulp settles into a clear top and a pulpy bottom. Classify it and justify.
Example 12
easyIs a pile of soil (sand, clay, pebbles, bits of leaf) a mechanical mixture?
Example 13
hardA sample of pond water contains suspended algae, dissolved minerals, and tiny insects. Is this one type of mixture, or more than one mixed together?
Example 14
challengeA student claims a sample is a mechanical mixture but a magnifying glass shows it looks uniform. Suggest two further tests to decide whether it is mechanical or homogeneous.
Example 15
mediumPizza with toppings: pure substance, mechanical mixture, or homogeneous mixture?
Example 16
easyDefine a mechanical mixture and give three examples.
Example 17
mediumOil and water are shaken together and form two visible layers. Mechanical mixture or not? Explain.
Example 18
hardA geologist crushes a granite sample into a fine powder. Is the powder still a mechanical mixture? Explain.
Example 19
hardDescribe a step-by-step procedure to separate a mechanical mixture of marbles, iron BBs, and sand.
Example 20
challengeExplain why mayonnaise looks perfectly smooth yet is classified as a mechanical mixture, and how you would prove it.