AnswersGCSS_Physical Science_ICMixtures

Mixtures Answers

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What is the correct classification of a mixture in which both a solid and a liquid are visible?

A
a homogeneous mixture and a solution
B
a homogeneous mixture and a suspension
C
a heterogeneous mixture and a solution
D
a heterogeneous mixture and a suspension
2
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Which will settle out if allowed to sit on a table?

A
a suspension
B
a colloid
C
a solution
D
a compound
3

Which is a property of every mixture?

A
One substance dissolves in another substance.
B
The molecules of one substance break down in the other.
C
Different samples of a single mixture have different characteristics.
D
One substance can be separated from another through physical means.
4

Eli states that sodium phosphate is a mixture because it is composed of both sodium ions and phosphate ions.Which is the best analysis of Eli’s statement?

A
It is correct because each ion is a pure substance, so sodium phosphate is made up of two pure substances.
B
It is correct because the composition of sodium phosphate changes depending on the sample.
C
It is incorrect because sodium phosphate is a compound that has a single composition.
D
It is incorrect because the two types of ions in sodium phosphate cannot be seen.
5

Otis watches a cooking show on making mayonnaise. The chef dissolves salt and sugar in vinegar. She mixes in an egg yolk, and then mixes in oil until the ingredients are completely blended together. The chef says that it’s great on sandwiches and that it can be stored without separating.Which best describes the purpose of the egg yolk in the recipe?

A
It allows the oil to change from liquid to a gas in order to form bubbles.
B
It acts to hold the vinegar and oil together in a colloid.
C
It helps the vinegar be able to form a solution with the salt and sugar.
D
It mixes with both the vinegar and oil to form a suspension.
6

Dominic made the table below to organize his notes about mixtures.What mistake did Dominic make?

Question illustration
A
The title should read “Properties of Solutions” because some mixtures do not have all of the properties listed.
B
There is a definite recipe to make each mixture, so the composition of a mixture is set.
C
Although it is possible to have more than one state, it is also possible to have only one state.
D
A single substance can be used to make a mixture if the substance is composed of more than one element.
7

Which is a characteristic of colloids?

A
are homogeneous mixtures
B
have large dispersed particles
C
will settle out over time
D
are made up of at least two substances
8

Which substance gets broken down in a homogeneous mixture?

A
colloid
B
solution
C
solute
D
solvent
9

Which material is the least likely to be recognized as a mixture by looking at it under a microscope?

A
a suspension
B
a colloid
C
a homogeneous mixture
D
a heterogeneous mixture
10

Maria examines a mixture that appears to be the same throughout. However, when she looks at a sample using a magnifying lens, she can see small droplets of liquid surrounded by another liquid.Which conclusion best fits her observations?

A
The mixture is a solution because it has the same appearance throughout the sample.
B
The mixture is a suspension because it is composed of two different-appearing substances.
C
The mixture is a homogeneous mixture because one liquid is dissolved in the other.
D
The mixture is a colloid because two different substances can be seen in a small sample.

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