
Chemistry NCFE Released Questions
Flashcard
•
Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a catalyst?
Back
A substance that increases the rate of a chemical reaction without being consumed in the process.
2.
FLASHCARD QUESTION
Front
What happens to sodium hydroxide (NaOH) when it dissolves in water?
Back
It dissociates into sodium ions (Na+) and hydroxide ions (OH-), forming an electrolytic solution.
3.
FLASHCARD QUESTION
Front
What is the gaseous state of matter?
Back
A state of matter where particles are far apart and move freely, filling the volume of their container.
4.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A process that leads to the transformation of one set of chemical substances to another, often involving the formation of new substances.
5.
FLASHCARD QUESTION
Front
What are cations and anions?
Back
Cations are positively charged ions, while anions are negatively charged ions.
6.
FLASHCARD QUESTION
Front
What is the critical point in a phase diagram?
Back
The temperature and pressure at which the distinction between liquid and gas phases disappears.
7.
FLASHCARD QUESTION
Front
What is the triple point of a substance?
Back
The unique set of conditions at which all three phases (solid, liquid, gas) coexist in equilibrium.
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