January 2025 Multiple Choice

January 2025 Multiple Choice

Assessment

Flashcard

Chemistry

9th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is thermal energy transfer?

Back

Thermal energy transfer is the process of heat moving from a hotter object to a cooler one until thermal equilibrium is reached.

2.

FLASHCARD QUESTION

Front

What happens when a hot object is placed in a cooler environment?

Back

Thermal energy is transferred from the hot object to the cooler environment.

3.

FLASHCARD QUESTION

Front

What is a redox reaction?

Back

A redox reaction is a chemical reaction that involves the transfer of electrons between two species, resulting in changes in oxidation states.

4.

FLASHCARD QUESTION

Front

What is the significance of collision energy in chemical reactions?

Back

Chemical reactions are more likely to occur when reactant particles collide with sufficient energy to overcome the activation energy barrier.

5.

FLASHCARD QUESTION

Front

What distinguishes O₂ from O₃ in terms of molecular structure?

Back

O₂ (oxygen) has a diatomic molecular structure, while O₃ (ozone) has a triatomic molecular structure.

6.

FLASHCARD QUESTION

Front

How do the properties of O₂ and O₃ differ?

Back

O₂ is a colorless, odorless gas essential for respiration, while O₃ is a pale blue gas with a distinct smell, used in the stratosphere to block UV radiation.

7.

FLASHCARD QUESTION

Front

What is a mixture in chemistry?

Back

A mixture is a combination of two or more substances that retain their individual properties and can be separated by physical means.

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