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WorksheetsGr12_Practice_23_Chemistry
Total questions: 10
Worksheet time: 10mins
The second principle energy level in an atom contains…
1 sublevel
2 sublevels
3 sublevels
4 sublevels
The curve that represents the relation between T and V…
A
B
C
D
1 kg of wood dust burns faster than 1 kg of a piece of wood because of the…
temperature
concentration
chemical composition
surface area
When an atom or ion is oxidized then its oxidation number ..
Decreases
Increases
Equals zero
Doesn’t change
In the following reaction, what is the reducing agent?
S
Cl2
H2S
HCl
The electrode at which reduction occurs is
always the cathode.
always the anode.
either the anode or the cathode.
always the half-cell.
When a rechargeable cell is being recharged, the cell acts as a(n)
fuel cell.
voltaic cell.
electrolytic cell.
Leclanche cell.
When silver is electroplated onto another metal, Ag+ is
oxidized at the anode.
reduced at the cathode.
oxidized at the cathode.
reduced at the anode.
Coating iron with another metal that is more resistant to corrosion (or oxidation) is known as…
electrolysis
clarification.
ionization
galvanization
The use of electrical energy to bring about a chemical reaction is..
refinement.
electrolysis.
distillation.
galvanization.
