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MCQs

Total Questions : 204 | Page 3 of 21 pages
Question 21. In order to conduct electricity, ionic metals
  1.    shall be dissolved in water
  2.    shall be finely grinded
  3.    shall be in molten form
  4.    shall be in ionic lattices
 Discuss Question
Answer: Option C. -> shall be in molten form
Answer: (c).shall be in molten form
Question 22. Position of metals in reactivity series does not determine the
  1.    rate of polarization
  2.    duration the light bulb will glow
  3.    brightness of the light
  4.    nature of bonding
 Discuss Question
Answer: Option A. -> rate of polarization
Answer: (a).rate of polarization
Question 23. A battery converts
  1.    chemical energy to kinetic energy
  2.    chemical energy to electrical energy
  3.    electrical to chemical energy
  4.    kinetic energy to chemical and electrical energy
 Discuss Question
Answer: Option B. -> chemical energy to electrical energy
Answer: (b).chemical energy to electrical energy
Question 24. Types of electrodes used during electrolysis affect the
  1.    rate of electrolysis
  2.    products of electrolysis
  3.    selective discharge of ions
  4.    formation of hydrogen ions
 Discuss Question
Answer: Option B. -> products of electrolysis
Answer: (b).products of electrolysis
Question 25. If graphite (C) is used as electrode in presence of concentrated Hydrochloric Acid (HCl), at anode
  1.    chlorine gas is produced
  2.    oxygen gas is produced
  3.    hydrogen gas is produced
  4.    hydrogen chloride is produced
 Discuss Question
Answer: Option A. -> chlorine gas is produced
Answer: (a).chlorine gas is produced
Question 26. The electrical insulator among the four compounds provided below is
  1.    Na₂O
  2.    MgO
  3.    Al₂O₃
  4.    SO₂
 Discuss Question
Answer: Option D. -> SO₂
Answer: (d).SO₂
Question 27. The standard electrode potential for any half-cell is the measurement of
  1.    voltage
  2.    ions apart
  3.    radii of ions
  4.    deposited ions
 Discuss Question
Answer: Option A. -> voltage
Answer: (a).voltage
Question 28. Conventionally, the electrode potential refers to
  1.    oxidation
  2.    reduction
  3.    neutralization
  4.    charge potential
 Discuss Question
Answer: Option B. -> reduction
Answer: (b).reduction
Question 29. The composition of a standard hydrogen electrode is
  1.    hydrogen gas
  2.    H⁺ ions
  3.    platinum electrode
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 30. In the electrochemical cell, the movement of ions is inhibited by a
  1.    salt bridge
  2.    electrode
  3.    solution
  4.    solute
 Discuss Question
Answer: Option A. -> salt bridge
Answer: (a).salt bridge

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