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MCQs

Total Questions : 204 | Page 2 of 21 pages
Question 11. In electrolysis of brine, ions moving to cathode include
  1.    sodium + hydrogen ions
  2.    hydroxide ions
  3.    chloride ions
  4.    hydrogen gas is bubbled off
 Discuss Question
Answer: Option A. -> sodium + hydrogen ions
Answer: (a).sodium + hydrogen ions
Question 12. A conductor
  1.    changes while conducting electricity
  2.    does not change while conducting electricity
  3.    does not allow flow of electricity
  4.    cannot operate at high pressures
 Discuss Question
Answer: Option B. -> does not change while conducting electricity
Answer: (b).does not change while conducting electricity
Question 13. Since ions are held in fixed positions by strong forces, electricity is not conducted by
  1.    electrodes
  2.    electrolytes
  3.    insulators
  4.    metals
 Discuss Question
Answer: Option C. -> insulators
Answer: (c).insulators
Question 14. Cathodic reduction refers to
  1.    loss of electrons at the anode
  2.    gain of electrons at the cathode
  3.    loss of electrons at the cathode
  4.    gain of electrons at the anode
 Discuss Question
Answer: Option B. -> gain of electrons at the cathode
Answer: (b).gain of electrons at the cathode
Question 15. After electrolysis of brine, resulting solution largely contains
  1.    Cl₂ gas
  2.    NaCl
  3.    NaOH
  4.    H₂ gas
 Discuss Question
Answer: Option C. -> NaOH
Answer: (c).NaOH
Question 16. Brightness of battery light depends on the
  1.    polarization
  2.    difference in the reactivity series of two metals in the battery
  3.    volts of bulb attached to the battery
  4.    all of these
 Discuss Question
Answer: Option B. -> difference in the reactivity series of two metals in the battery
Answer: (b).difference in the reactivity series of two metals in the battery
Question 17. Difficulty of discharge is lowest in
  1.    sulphate ions
  2.    nitrate ions
  3.    chloride ions
  4.    bromide ions
 Discuss Question
Answer: Option D. -> bromide ions
Answer: (d).bromide ions
Question 18. Sugar solution (C₁₂H₂₂O₁₁) is
  1.    strong electrolyte
  2.    non-electrolyte
  3.    weak electrolyte
  4.    acidic
 Discuss Question
Answer: Option B. -> non-electrolyte
Answer: (b).non-electrolyte
Question 19. Distilled water is an example of
  1.    strong electrolyte
  2.    non-electrolyte
  3.    weak electrolyte
  4.    catalyst
 Discuss Question
Answer: Option B. -> non-electrolyte
Answer: (b).non-electrolyte
Question 20. Oil is an example of
  1.    strong electrolyte
  2.    non-electrolyte
  3.    weak electrolyte
  4.    week insulator
 Discuss Question
Answer: Option B. -> non-electrolyte
Answer: (b).non-electrolyte

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