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WorksheetsRedox quiz
Total questions: 18
Worksheet time: 48mins
Reduction is the ___________ of electrons.
loss
gain
sharing
transfer
Combustion and single-replacement reactions are __________ redox reactions.
always
never
sometimes
mostly
In a redox reaction, the oxidizing agent
gains electrons and is oxidized
loses electrons and is oxidized
loses electrons and is reduced
gains electrons and is reduced
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
In the reaction Zn + H2O --> ZnO2 + H2
which element, if any, is oxidized?
Zinc
Hydrogen
Oxygen
None
NaOH + Li --> LiOH + Na
Oxidation states for
NaBr
Na=+1, Br=-1
Na=+1, Br=-7
Na=+2, Br=-2
Na=+1, Br=-2
Which are examples of reduction?
I and II
I and III
II and III
I, II and III
Oxidation state for
I2
I=-1
I=0
I=+7
I=-2
Oxidation is the _________ of electrons.
loss
gain
sharing
transfer
Which statement is correct?
H2SO3 is reducing agent because it undergoes reduction.
H2SO3 is reducing agent because it undergoes oxidation.
Sn4+ is oxidizing agent because it undergoes oxidation
Sn4+ is reducing agent because it undergoes oxidation
What is the oxidation number of chromium in dichromate ion Cr2O72- ?
+7
-8
+3
+6
Which reaction is an Redox reaction?
NaOH(aq) + HCl(aq) ‑‑> NaCl(aq) + H2O(l)
AgNO3(aq) + KI(aq) ‑‑> AgI(s) + KNO3(aq)
Mg(OH)2(s) + H2SO4(aq) ‑‑> MgSO4(aq) + 2H2O(l)
Cu(s) + 4HNO3(aq) ‑‑> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)
Mg → Mg2+ + 2e–
What is the oxidation number of iodine in HIO64‑(aq) ?
-1
+9
+7
-3
A spontaneous reaction would occur in test tubes (hint : you need your reactivity series on page 415)
A. I and V
B. I and III
C. II and IV
D. II and V
