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MCQs

Total Questions : 204 | Page 14 of 21 pages
Question 131. Either molten ionic compound or a concentrated aqueous compound, when it is decomposed it is called
  1.    electrode
  2.    electrolyte
  3.    solution
  4.    products
 Discuss Question
Answer: Option B. -> electrolyte
Answer: (b).electrolyte
Question 132. Electrolysis purify bauxite (Al(OH)₃) to give pure
  1.    Al₂O₃
  2.    AlCl₃
  3.    AlO
  4.    AlCl
 Discuss Question
Answer: Option A. -> Al₂O₃
Answer: (a).Al₂O₃
Question 133. The purification of copper is only possible by
  1.    hydrolysis
  2.    electrolysis
  3.    photolytic
  4.    heating
 Discuss Question
Answer: Option B. -> electrolysis
Answer: (b).electrolysis
Question 134. In non-metals, half cells of electricity are conducted via solution by
  1.    platinum wire only
  2.    platinum foil only
  3.    aluminum foil
  4.    platinum wire and foil
 Discuss Question
Answer: Option D. -> platinum wire and foil
Answer: (d).platinum wire and foil
Question 135. The part of a platinum electrode in a reaction is
  1.    more
  2.    less
  3.    neutral
  4.    often
 Discuss Question
Answer: Option B. -> less
Answer: (b).less
Question 136. Half cells contain two ions of same element with different
  1.    atomic mass
  2.    oxidation state
  3.    nucleon number
  4.    electronic configuration
 Discuss Question
Answer: Option B. -> oxidation state
Answer: (b).oxidation state
Question 137. During electrolysis, the mass of a substance produced is proportional to
  1.    time of constant current only
  2.    strength of current only
  3.    voltage provided
  4.    time of constant current and strength of current
 Discuss Question
Answer: Option D. -> time of constant current and strength of current
Answer: (d).time of constant current and strength of current
Question 138. The negative electrode in a half cell is made up of
  1.    hydrogen
  2.    zinc
  3.    copper
  4.    tungsten
 Discuss Question
Answer: Option B. -> zinc
Answer: (b).zinc
Question 139. The types of half cell include
  1.    metal/metal ion
  2.    non-metal/non-metal
  3.    ion/ion
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 140. Aqueous Sulfuric Acid (H₂SO₄(aq)) contains
  1.    Hydrogen ions
  2.    hydro oxide ions
  3.    sulfate ions
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these

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