IB Chemistry - Redox
Authored by Anthony Cvek
Chemistry, Science
11th - 12th Grade
NGSS covered
Used 140+ times
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29 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which one of the following is not a redox reaction?
Br2 +SO2 +2H2O → SO42– +4H+ +2Br–
SnCl2 + HgCl2 → Hg + SnCl4
Cu2O+H2SO4 → CuSO4 +Cu+H2O
2CrO42– + 2H+ → Cr2O72– + H2O
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Molecules or ions that contain an element with an oxidation state of +5 include
1 H2SO3
2 NO2+
3 [Cr(H2O)4Cl2]+
4 ClO3-
1, 2 and 3 only correct
1 and 3 only correct
NO2+
2 and 4 only correct
4 only correct
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What happens to the Cr3+ (aq) ion when it is converted to CrO42− (aq)?
Its oxidation number decreases and it undergoes reduction.
Its oxidation number decreases and it undergoes oxidation.
Its oxidation number increases and it undergoes reduction.
Its oxidation number increases and it undergoes oxidation.
Tags
NGSS.HS-PS1-2
NGSS.HS-PS1-1
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The following reactions are spontaneous as written.
Fe(s) + Cd2+ (aq) → Fe2+ (aq) + Cd(s)
Cd(s) + Sn2+ (aq) → Cd2+ (aq) + Sn(s)
Sn(s) + Pb2+ (aq) → Sn2+ (aq) + Pb(s)
Which of the following pairs will react spontaneously?
I. Sn(s) + Fe2+ (aq)
II. Cd(s) + Pb2+ (aq)
III. Fe(s) + Pb2+ (aq)
I only
II only
III only
II and III only
Tags
NGSS.HS-PS1-2
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the oxidation number of chlorine in HClO?
0
-1
+1
+5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Oxidation is the _________ of electrons.
loss
gain
sharing
transfer
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Reduction is the ___________ of electrons.
loss
gain
sharing
transfer
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