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Elements, Compounds, and Mixtures Quiz
Test Your Knowledge: Elements, Compounds & Mixtures
1) Which of the following best defines an
element
?
A substance composed of only one type of atom.
Two or more atoms chemically bonded in a fixed ratio.
A mixture of different substances with no fixed ratio.
2) Which statement is
true
about mixtures?
Their components form a completely new substance with unique properties.
Their components can be separated by physical methods.
They always exist in a fixed composition ratio.
3) Which of the following describes a
compound
correctly?
A single type of atom that cannot be broken down further.
A substance formed by chemically combining two or more elements in a fixed ratio.
Two or more substances physically combined in varying proportions.
4) Which process is typically used to break down a compound into simpler substances?
Filtration
Distillation
Electrolysis
5) Which of the following is an example of a
mixture
?
Sodium chloride (NaCl)
Air (combination of gases)
Water (H₂O)
6) Which statement
best
describes the properties of an element?
It can be separated into simpler substances by ordinary chemical methods.
It has a unique set of properties and cannot be broken down further by chemical means.
It consists of multiple types of atoms in no specific ratio.
7) Which statement about
compounds
is
incorrect
?
They can be broken down into their constituent elements by chemical means.
They always contain elements in a fixed ratio.
They retain all the physical properties of the elements that form them.
8) Which of the following is a
compound
?
Helium (He)
Carbon dioxide (CO₂)
Brass (an alloy of copper and zinc)
9) What is the smallest unit of an element that still retains its properties?
Atom
Molecule
Ion
10) Which statement is
NOT
true for a mixture?
Its composition can vary.
The components retain their original properties.
It has a fixed ratio of components.
11) Which method
cannot
be used to separate a mixture?
Filtration
Distillation
Electrolysis
12) An alloy (such as brass) is an example of a:
Element
Compound
Mixture
13) Which statement correctly compares elements, compounds, and mixtures?
An element is made of multiple types of atoms; a compound is one type of atom, and a mixture has a fixed ratio.
A compound can be broken down chemically, while an element cannot; mixtures can be separated physically.
A mixture has chemical bonds between its components, whereas compounds do not.
14) Which of the following is
true
for an
element
?
It can be broken down into simpler substances by chemical means.
It contains two or more types of atoms joined chemically.
It cannot be chemically broken down into simpler substances.
15) Which option is an example of a
homogeneous mixture
?
Sand and water
Saltwater
Oil and water
Check Answers
Home
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Mathematics
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4 Lessons - Science/Math Online Tuition
PSLE Science Two Column Notes
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Achievement Unlocked! [Book 1] Mission to the Desert Planet
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