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MCQs

Total Questions : 32 | Page 2 of 4 pages
Question 11. As compare to iron, aluminum has
  1.    higher tendency to oxidize
  2.    less tendency to oxidize
  3.    equal tendency to oxidize
  4.    all of above
 Discuss Question
Answer: Option A. -> higher tendency to oxidize
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 12. Oxidation-reduction reaction involves
  1.    transfer of neutrons
  2.    transfer of protons
  3.    transfer of electrons
  4.    all of above
 Discuss Question
Answer: Option C. -> transfer of electrons
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 13. Electrochemical cells convert which of these into electrical energy?
  1.    mechanical energy
  2.    potential energy
  3.    kinetic energy
  4.    chemical energy
 Discuss Question
Answer: Option D. -> chemical energy
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 14. Lead and Zinc metals occur naturally as
  1.    oxides
  2.    sulphite ores
  3.    carbon ores
  4.    chloride ores
 Discuss Question
Answer: Option B. -> sulphite ores
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 15. Conditions for good electroplating are
  1.    high current density
  2.    low temperature
  3.    high concentration of metal in electrolyte
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 16. A physical or chemical process that occurs by itself is called
  1.    non spontaneous
  2.    self occurring process
  3.    spontaneous process
  4.    thermodynamic process
 Discuss Question
Answer: Option C. -> spontaneous process
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 17. The oxidation state of any free element is always
  1.    1
  2.    2
  3.    3
  4.    0
 Discuss Question
Answer: Option D. -> 0
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 18. Voltaic cells generate electricity by
  1.    spontaneous redox reaction
  2.    non spontaneous redox reaction
  3.    sublimation reaction
  4.    thermochemical reaction
 Discuss Question
Answer: Option A. -> spontaneous redox reaction
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 19. The process used to deposit one metal over another metal is called
  1.    electrolysis
  2.    electroplating
  3.    carbon plating
  4.    none of above
 Discuss Question
Answer: Option B. -> electroplating
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 20. The electrolyte among the following is
  1.    NaOH
  2.    urea
  3.    glucose
  4.    benzene
 Discuss Question
Answer: Option A. -> NaOH
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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