General Science

REDOX REACTION MCQs

Total Questions : 20

Page 1 of 2 pages
Question 1. Which of the following is a redox reaction?
  1.    NaCl + KNO3 → NaNO3 + KCl
  2.    CaC2O4 + 2HCl → CaCl2 + H2C2O4
  3.    Mg(OH)2 + 2NH4Cl → MgCl2 + 2NH4OH
  4.    Zn + 2AgCN → 2Ag + Zn (CN)2
 Discuss Question
Answer is Option D. -> Zn + 2AgCN → 2Ag + Zn (CN)2
Question 2. Find the redox reaction
  1.    In the atmosphere, O3 from O2 by lighting
  2.    The reaction of H2SO4 with NaOH
  3.    Both oxidation and reduction reaction
  4.    Evaporation of water
 Discuss Question
Answer is Option C. -> Both oxidation and reduction reaction
Question 3. Redox reactions are oxidation-reduction chemical reactions
  1.    TRUE
  2.    FALSE
  3.    Can be true or false
  4.    Can not say
 Discuss Question
Answer is Option A. -> TRUE
Question 4. Find the correct statement concerning the Latimer diagrams:
  1.    Latimer diagrams are also called oxidation diagrams
  2.    The data from the Latimer diagrams cannot be used when calculating the standard potentials of redox reactions.
  3.    Latimer diagram contains different chemical species of an element with the most highly oxidized species on the left and the most reduced species of the element on the right correct
  4.    None
 Discuss Question
Answer is Option D. -> None
Question 5. Mg + PbCl2 --> MgCl2 + Pb
  1.    Mg is oxidized and Cl- is reduced
  2.    Mg is oxidized and Pb+2 is reduced
  3.    Mg is reduced and Cl- is oxidized
  4.    Mg is reduced and Pb+2 is oxidized
 Discuss Question
Answer is Option B. -> Mg is oxidized and Pb+2 is reduced
Question 6. The value of x & y in the following redox reaction-xCl2 + 6OH– → ClO−3 + yCl– + 3H2O are
  1.    x = 5, y = 3
  2.    x = 2, y = 4
  3.    x = 4, y = 2
  4.    x = 3, y = 5
 Discuss Question
Answer is Option D. -> x = 3, y = 5
Question 7. Which is a redox reaction?
  1.    H2SO4 + 2NaOH → Na2SO4 + 2H2O
  2.    BaCl2 + H2SO4 → BaSO4 + 2HCl
  3.    CH3COOH + C2H5OH → CH3COOC2H5 + H2O
  4.    2FeCl3 + SnCl2 → 2FeCl2 + SnCl4
 Discuss Question
Answer is Option D. -> 2FeCl3 + SnCl2 → 2FeCl2 + SnCl4
Question 8. The reaction NH3 + HCl → NH4Cl is a redox reaction
  1.    False
  2.    Ture
 Discuss Question
Answer is Option A. -> False
Question 9. Which of the following do you think is a correct statement?
  1.    oxidation is caused by a reducing agent
  2.    addition of electropositive element is a type of oxidation
  3.    the oxidation reaction is a Redox reaction
  4.    reduction is the addition of hydrogen
 Discuss Question
Answer is Option D. -> reduction is the addition of hydrogen
Question 10. SnCl2 + 2FeCl2 → SnCl4 + 2FeCl2 is an example of __________________ reaction
  1.    only oxidation
  2.    only reduction
  3.    redox
  4.    neither oxidation nor reduction
 Discuss Question
Answer is Option C. -> redox