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MCQs

Total Questions : 204 | Page 18 of 21 pages
Question 171. When the rate of gain of electrons will be equal to the loss of electrons state obtained will be
  1.    Redox equilibrium
  2.    neutral
  3.    constant
  4.    unstable
 Discuss Question
Answer: Option A. -> Redox equilibrium
Answer: (a).Redox equilibrium
Question 172. Half-cell which is used to refer different electrode is standard
  1.    carbon electrode
  2.    hydrogen electrode
  3.    copper electrode
  4.    zinc electrode
 Discuss Question
Answer: Option B. -> hydrogen electrode
Answer: (b).hydrogen electrode
Question 173. The difference in potential between metal ion system and another system is called
  1.    electrode difference
  2.    electrode potential
  3.    potential difference
  4.    electrode charge
 Discuss Question
Answer: Option B. -> electrode potential
Answer: (b).electrode potential
Question 174. Electrochemical cell is achieved by connecting two
  1.    ions
  2.    electrodes
  3.    half cells
  4.    none of above
 Discuss Question
Answer: Option C. -> half cells
Answer: (c).half cells
Question 175. The carbon or graphite rod which is used to conduct electricity in electrolyte is called
  1.    electrode
  2.    anode
  3.    cathode
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 176. The benefits of cryolite
  1.    dissolves aluminum oxide only
  2.    improves electrical conductivity only
  3.    oxidizes the electrolyte
  4.    dissolves aluminum oxide and improves electrical conductivity
 Discuss Question
Answer: Option D. -> dissolves aluminum oxide and improves electrical conductivity
Answer: (d).dissolves aluminum oxide and improves electrical conductivity
Question 177. For the electrolysis of aluminum oxide, it must be
  1.    solid
  2.    liquid
  3.    vapor
  4.    molten
 Discuss Question
Answer: Option D. -> molten
Answer: (d).molten
Question 178. The liquid in an electrolytic cell should always flows towards
  1.    anode
  2.    cathode
  3.    all around
  4.    nowhere
 Discuss Question
Answer: Option B. -> cathode
Answer: (b).cathode
Question 179. Electrolysis is used to
  1.    produce metals
  2.    purify metals
  3.    refine metals
  4.    three of above
 Discuss Question
Answer: Option D. -> three of above
Answer: (d).three of above
Question 180. Faraday unit is named after a scientist
  1.    Michael Faraday
  2.    Faraday John
  3.    Samuel faraday
  4.    George Smith
 Discuss Question
Answer: Option A. -> Michael Faraday
Answer: (a).Michael Faraday

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