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REDOX REACTIONS MCQs

Total Questions : 25 | Page 1 of 3 pages
Question 1. What type of reaction is the following? Zn(s) + 2Cu(NO3)2(aq) ---> 2Cu(s) + Zn(NO3)2(aq)
  1.    double displacement
  2.    single displacement
  3.    precipitation
  4.    neutralization
 Discuss Question
Answer: Option B. -> single displacement
Question 2. What is oxidation number of H in CaH2?
  1.    +1
  2.    -1
  3.    0
  4.    +2
 Discuss Question
Answer: Option B. -> -1
Question 3. What is oxidation number of Cr in Cr2O72-?
  1.    -2
  2.    +2
  3.    +6
  4.    +12
 Discuss Question
Answer: Option C. -> +6
Question 4. Name the following ionic compound: Cs2S
  1.    cesium sulfide
  2.    cesium sulfate
  3.    cesium (II) sulfate
  4.    cesium (II) sulfide
 Discuss Question
Answer: Option A. -> cesium sulfide
Question 5. Which problem is balanced?
  1.    PbO2 + 2H2
  2.    SO2 + H20 --> H2SO4
  3.    2Na + 2H2O --> 2NaOH + H2
  4.    all of the above
 Discuss Question
Answer: Option C. -> 2Na + 2H2O --> 2NaOH + H2
Question 6. What will be the result of the following: Br2 + NaF ->
  1.    bromine will replace Na
  2.    Na will replace Br
  3.    Br will replace F
  4.    no reaction will occur
 Discuss Question
Answer: Option D. -> no reaction will occur
Question 7. The statements which contain correct definitions of reduction
  1.    the removal of oxygen
  2.    the decrease in oxidation state/p>
  3.    the removal of electrons
  4.    Both A & B
 Discuss Question
Answer: Option D. -> Both A & B
Question 8. A compound having +2 oxidation state of O is
  1.    H2O
  2.    H2O2
  3.    OF2
  4.    O2F2
 Discuss Question
Answer: Option C. -> OF2
Question 9. Which of the following represents reduction?
  1.    C →  CO
  2.    N2 →  NH3
  3.    Zn  →   Zn2+ 
  4.    H2 →  H2O
 Discuss Question
Answer: Option B. -> N2 →  NH3
Question 10. Which of the following represents oxidation?
  1.    C → CH4
  2.    Fe3+ → Fe2+
  3.    Cl2 → 2Cl-
  4.    Zn → ZnO
 Discuss Question
Answer: Option D. -> Zn → ZnO

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