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Electricity & Chemistry Exam Questions and Answers PDF Download: Test 7

MCQ 31: Purpose of a voltmeter is to:

  1. ensure constant flow of electricity
  2. measure amount of current
  3. measure voltage of cells and batteries
  4. help bulbs to glow

MCQ 32: The difficulty of discharge is lowest in:

  1. calcium ions
  2. sodium ions
  3. magnesium ions
  4. zinc ions

MCQ 33: In a dry cell, the polarization is prevented through:

  1. potassium hydroxide mixture
  2. ammonium nitrate mixture
  3. manganese oxide
  4. Sodium hydroxide mixture

MCQ 34: Ethanol C2H5OH(I) is an example of:

  1. strong electrolyte
  2. non-electrolyte
  3. weak electrolyte
  4. carboxylic acid

MCQ 35: In electrolysis of dilute Hydrochloric Acid (HCl(aq)), at anode,:

  1. oxygen gas is given off
  2. hydrogen gas is given off
  3. chlorine gas is given off
  4. hydrogen chloride gas is given off

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