WorksheetsPractice 10% - Pure substances & Mixtures
Total questions: 32
Worksheet time: 32mins
Which of the following is NOT a characteristic of a mixture?
Are made up of two or more different substances in the same place.
Can be separated using physical methods.
Keep their individual properties
Are chemically combined.
Which of the following is NOT considered a separation mixture?
Sieving
Decantation
Burning
Evaporation
Distillation
Complete the sentence: "A mixture is combination of _________ substances in the same area"
Only 1
Zero
Two or more
No
Complete the sentence: "Mixtures will consist of different substances which are _____________"
Chemically combined and not physically combined.
Physically combined and not chemically combined
Not combined at all.
Can change between physically and chemically combined.
Which of the following refers to a homogeneous mixture?
The substances can be observed (seen) at first sight
You can appreciate the phase separation of its substances.
The substances can form a sediment.
The substances are indistinguishable to the eye.
Which of the following refers to a heterogeneous mixture?
The substances have a uniform appearance.
Sediments are not formed.
You can appreciate the phase separation of it’s substances
The substances are indistinguishable to the eye.
Sugar and sand form which type of mixture?
Homogeneous Mixture.
Heterogeneous Mixture.
Which of the following is a homogeneous mixture?
Coca-cola
Water
Silver
Mixed Nuts
Which of the following is a heterogeneous mixture?
Coca-cola
Water
Silver
Mixed Nuts
Air forms which type of mixture?
Homogeneous Mixture
Heterogeneous Mixture
Wine forms which type of mixture?
Homogeneous Mixture
Heterogeneous Mixture
Considering the CHARACTERISTICS of a heterogeneous mixture, which best represents this type of mixture?
Considering the CHARACTERISTICS of a homogeneous mixture, which best represents this type of mixture?
If you have a mixture of oil, water, salt and soil. Which part of your mixture is considered HOMOGENEOUS?
oil and water
oil and soil
water and soil
water and salt
If you have a mixture of alcohol, water, rocks and salt. Which part of your mixture is considered HETEROGENEOUS?
Alcohol and water
Alcohol and salt
Water and rocks
Water and salt
Two mixtures: Mixture A = alcohol and water, Mixture B = Oil and water, what can you tell me about your mixtures?
Mixture A is homogeneous
Mixture B is homogeneous
Mixture A, forms a sediment.
Mixture B the substances are indistinguishable to the eye
What is the difference between a compound and a mixture?
Compounds are CHEMICALLY combined, mixtures are PHYSICALLY combined.
Both are physically combined.
Compounds are PHYSICALLY combined, mixtures are CHEMICALLY combined.
Both are chemically combined.
Which of the following has ONLY 2 different types of elements?
Mg
Na2CO3
KOH
H2O
Which of the following is considered a compound?
CaCO3
He
Ag
N2
Which of the following refers to a chemical ELEMENT?
HCl (the last letter is a lower case L)
CO2
H20
Mg
Which of the following is NOT a characteristic of a PURE SUBSTANCE?
Constant composition.
Unique Melting Points
Unique properties.
The same boiling points
Which of the following best represents WATER? (think .... Is water an element, compound or mixture???)
Which of the following represents a mixture?
Only C and F
Only B, C and F
Only B, C, D and F
Only F
Which of the following represents an element?
Only A
A, and B
A, D and E
A, D and F
Which of the following represents a compound?
Only D
Only B
B, D and E
B and C
Pure substances ...
Do not have constant composition or distinct properties
Are made of two or more different types of elements.
Have constant composition or distinct properties
Are considered mixtures
What question should I ask myself in order to differentiate between an element and a compound?
Does the compound have volume?
Does the substance have distinct properties?
Is the substance made of one or more types of elements?
Does the substance have a constant composition?
Which of the following images represents an element?
1 & 2
2 & 3
3 & 4
2 & 4
Which of the following options is the correct symbol for the element magnesium?
MG
Mg
mG
mg
Which of the following molecules is made of two carbon atoms and six hydrogen atoms?
How many atoms are there in TOTAL in the sulfur trioxide molecule?
1
2
3
4
5
What happens when two atoms chemically combine?
Nothing
They can be separated physically
They make a new substance
They can not be separated.
