Chemistry Vocabulary Quiz

Name:

Date:

Instructions: Test your knowledge of chemistry terms, from elements and reactions to laboratory equipment and chemical processes.

1.
What is a 'catalyst' in chemistry?
A
A byproduct of combustion
B
A substance that speeds up a reaction without being consumed
C
A measurement of acidity
D
A type of chemical bond
2.
What does 'exothermic' mean when describing a chemical reaction?
A
It produces gas
B
It requires electricity
C
It releases heat
D
It absorbs light
3.
What is an 'isotope'?
A
A molecule with double bonds
B
A charged atom
C
An atom with a different number of neutrons than usual
D
A radioactive element
4.
In chemistry, what is a 'solution'?
A
A type of chemical equation
B
A solid compound
C
A pure element
D
A homogeneous mixture of two or more substances
5.
What does 'pH' measure?
A
The acidity or alkalinity of a solution
B
The boiling point of a compound
C
Temperature of a substance
D
The density of a liquid
6.
What is a 'covalent bond'?
A
A bond between metals
B
A bond formed by sharing electrons between atoms
C
A weak intermolecular force
D
A bond formed by the transfer of electrons
7.
What does 'volatile' mean in chemistry?
A
Highly acidic
B
Easily evaporated at normal temperatures
C
Explosive
D
Radioactive
8.
What is 'titration'?
A
A technique to determine concentration by adding a reagent until a reaction is complete
B
Measuring the weight of a compound
C
Heating a substance until it melts
D
Filtering impurities from a solution
9.
What is a 'precipitate'?
A
An insoluble solid that forms in a solution during a reaction
B
A catalyst that dissolves
C
A liquid that evaporates quickly
D
A gas released during a reaction
10.
What is 'valence' in chemistry?
A
The combining capacity of an atom, related to electrons in the outer shell
B
The color of a compound
C
The weight of an atom
D
The speed of a chemical reaction
11.
What does 'endothermic' mean?
A
Releases heat during a reaction
B
Absorbs heat from the surroundings during a reaction
C
Generates electricity
D
Produces light
12.
What is a 'mole' in chemistry?
A
A measure of temperature
B
A unit representing approximately 6.022 x 10^23 particles
C
A type of chemical bond
D
A type of molecule
13.
What is 'sublimation'?
A
A liquid turning into gas
B
A gas turning into liquid
C
A solid turning directly into gas without becoming liquid first
D
A chemical reaction that produces heat
14.
What is an 'alloy'?
A
A mixture of two or more metals or a metal with another element
B
A pure metal
C
A noble gas
D
A type of acid
15.
What does 'distillation' involve?
A
Heating a mixture and collecting the vapor to separate substances by boiling point
B
Dissolving a solid in water
C
Adding a catalyst to speed up a reaction
D
Freezing a mixture to separate components

Find more free puzzles and brain games at www.SeniorBrainGames.org