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Redox Reactions(General Knowledge > General Science ) Questions and Answers
Home
Topic
General Knowledge
General Science
Redox Reactions
Question 1.
What type of reaction is the following? Zn(s) + 2Cu(NO3)2(aq) ---> 2Cu(s) + Zn(NO3)2(aq)
double displacement
single displacement
precipitation
neutralization
Explanation:-
Answer: Option B. ->
single displacement
Question 2.
What is oxidation number of H in CaH2?
+1
-1
0
+2
Explanation:-
Answer: Option B. ->
-1
Question 3.
What is oxidation number of Cr in Cr2O72-?
-2
+2
+6
+12
Explanation:-
Answer: Option C. ->
+6
Question 4.
Name the following ionic compound: Cs2S
cesium sulfide
cesium sulfate
cesium (II) sulfate
cesium (II) sulfide
Explanation:-
Answer: Option A. ->
cesium sulfide
Question 5.
Which problem is balanced?
PbO2 + 2H2
SO2 + H20 --> H2SO4
2Na + 2H2O --> 2NaOH + H2
all of the above
Explanation:-
Answer: Option C. ->
2Na + 2H2O --> 2NaOH + H2
Question 6.
What will be the result of the following: Br2 + NaF ->
bromine will replace Na
Na will replace Br
Br will replace F
no reaction will occur
Explanation:-
Answer: Option D. ->
no reaction will occur
Question 7.
The statements which contain correct definitions of reduction
the removal of oxygen
the decrease in oxidation state/p>
the removal of electrons
Both A & B
Explanation:-
Answer: Option D. ->
Both A & B
Question 8.
A compound having +2 oxidation state of O is
H2O
H2O2
OF2
O2F2
Explanation:-
Answer: Option C. ->
OF2
Question 9.
Which of the following represents reduction?
C → CO
N2 → NH3
Zn → Zn2+
H2 → H2O
Explanation:-
Answer: Option B. ->
N2 → NH3
Question 10.
Which of the following represents oxidation?
C → CH4
Fe3+ → Fe2+
Cl2 → 2Cl-
Zn → ZnO
Explanation:-
Answer: Option D. ->
Zn → ZnO
1
2
3
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