Unit 1.2 Test Part 2 2024
Flashcard
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What are physical properties?
Back
Physical properties are characteristics of a substance that can be observed or measured without changing the substance's chemical identity. Examples include color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point.
2.
FLASHCARD QUESTION
Front
What is a colloid?
Back
A colloid is a type of mixture where tiny particles are dispersed throughout a substance but do not settle out. Colloids exhibit the Tyndall effect, which is the scattering of light.
3.
FLASHCARD QUESTION
Front
What is an example of a physical change?
Back
An example of a physical change is honey dissolving in tea, as it involves a change in state but not in chemical composition.
4.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements chemically combine in fixed proportions, resulting in new properties.
5.
FLASHCARD QUESTION
Front
What is distillation?
Back
Distillation is a separation process that involves boiling a liquid to create vapor and then cooling the vapor to create a liquid, effectively separating components based on their boiling points.
6.
FLASHCARD QUESTION
Front
What are chemical properties?
Back
Chemical properties are characteristics that describe a substance's ability to undergo chemical changes, such as reactivity with acids, flammability, and oxidation states.
7.
FLASHCARD QUESTION
Front
What is the difference between a homogeneous mixture and a heterogeneous mixture?
Back
A homogeneous mixture has a uniform composition throughout (e.g., saltwater), while a heterogeneous mixture has a non-uniform composition with distinct phases (e.g., salad).
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