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WorksheetsS3_UT#4
Total questions: 20
Worksheet time: 20mins
What is the pH range of an acid?
4-6
1-7
1-6
8-14
What would happen to blue litmus paper if it came into contact with an acid?
It would turn red
It would turn green
It would stay blue
It would turn pink
Which of the following pH values would be the weakest acid?
1
3
5
6
Which of the following chemical formulas is NOT an acid?
HBr
HF
HCl
LiOH
7
11
The atomic number ALWAYS tells you what?
number of electrons
number of protons
number of neutrons
sum of electrons and protons in an atom.
Atoms of elements that are in the same group have the same number of
protons.
neutrons.
valence electrons.
protons and neutrons.
Which is true about the 2 elements in the picture?
they are in the same period
they are no where near each other
they are in the same group with element R on top
they are in the same group with element Q on top
Metallic bonds are characterized by:
The sharing of electron pairs between atoms
The transfer of electrons from one atom to another
The attraction between free-floating valence electrons and positively charged metal ions
The sharing of electrons between non-metal atoms
Fill in the blank: Compared to pure metals, alloys have better ________ resistance, are less brittle, and have a higher strength and better workability.
corrosion
heat
electrical
magnetic
Which metal reacts fastest with acid?
Copper
Iron
Zinc
Magnesium
What happens when you test for hydrogen?
It does not ignite a burning splint
It ignites a burning splint with a squeaky pop
It ignites and produces a lilac flame
It ignites with a loud explosion
Determine which statement is true:
This is a chromatogram of a pure substance
In this chromatogram all of the substances have relatively equal attractions to the stationary phase
This is a chromatogram of a mixture with three components having equal amounts in the mixture
This is a mixture with three components that each have different amounts present in the sample
Which separation technique is used to obtain pure water from seawater?
Simple distillation
Filtration
Chromatography
Evaporation
