
IGCSE Chemistry
Authored by Lisa Thompson
Science
10th Grade
NGSS covered
Used 18+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the oxidation number of Cl2?
0
+1
+2
-1
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In which substance does bromine have an oxidation number of +1?
Br2
HBr
HBrO
HBrO2
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Is calcium oxidized or reduced in the following reaction?
2 CaO--> 2 Ca + O2
Oxidized
Reduced
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Reduction is the ___________ of electrons.
loss
gain
sharing
transfer
Tags
NGSS.HS-PS1-1
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
The following chemical equation represents the extraction of silicon from quartz using coke. SiO2 + C → Si + CO2 What is the change in oxidation number of silicon?
+2 to 0
+4 to 0
0 to +2
0 to +4
6.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Which of the following cannot occur during oxidation?
Gain of oxygen
Donation of electrons
Loss of hydrogen
Decrease in oxidation number
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
-2
0
-1
+1
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