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NY Regents Chemistry Electrochemistry — practice questions — page 2

Explore 44 free Electrochemistry questions in NY Regents Chemistry Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Electrochemistry questions and exercises with answers

Showing questions 31–44 of 44.

Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Complete the thermodynamic linksRead the answer and worked solution →What the Nernst equation is forRead the answer and worked solution →Which quantity is being described?Read the answer and worked solution →True or false: batteries, fuel cells and corrosionRead the answer and worked solution →Order the steps: find a standard cell potentialRead the answer and worked solution →Flip and pair: symbol with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Tap every factor conductivity depends onRead the answer and worked solution →Assertion and reason: potentialsRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →Complete the dilution behaviourRead the answer and worked solution →True or false: the standard scaleRead the answer and worked solution →

Worked practice questions

Two are true, one is not

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Questions
  1. False statement
    A galvanic cell needs an external power supply
    Statements
    1. A galvanic cell runs a spontaneous reaction
    2. An electrolytic cell consumes electrical energy
    3. A galvanic cell needs an external power supply
  2. False statement
    Molar conductivity decreases with dilution
    Statements
    1. Molar conductivity decreases with dilution
    2. Conductivity decreases with dilution
    3. Molar conductivity increases with dilution
  3. False statement
    Electrode potentials are absolute, not relative
    Statements
    1. E°(cell) = E°(cathode) − E°(anode)
    2. Electrode potentials are absolute, not relative
    3. The hydrogen electrode is the zero of the scale
The false line always swaps galvanic for electrolytic, or conductivity for molar conductivity. Source: syllabus Chemistry Part I, Ch 2 Electrochemistry.

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Three of these are wrong. Find the one that holds.

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Questions
  1. Question
    Three of these statements about molar conductivity are false.
    Choices
    1. Item
      It equals κ divided by concentration
      Correct
      Yes
    2. Explanation
      Molar conductivity RISES on dilution.
      Item
      It falls as the solution is diluted
    3. Explanation
      Conductivity is per unit volume, not per mole.
      Item
      It is the same as conductivity
    4. Explanation
      The concentration divides, it does not multiply.
      Item
      It equals κ times concentration
  2. Question
    Three of these statements about cells are false.
    Choices
    1. Item
      Galvanic cells run spontaneous redox
      Correct
      Yes
    2. Explanation
      It consumes electrical energy instead.
      Item
      An electrolytic cell produces energy
    3. Explanation
      It is the source, not the load.
      Item
      A galvanic cell needs a power supply
    4. Explanation
      Only the electrolytic cell does.
      Item
      Both types drive non-spontaneous redox
Each trap is a real misreading of the chapter. Source: syllabus Chemistry Part I, Ch 2 Electrochemistry.

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Complete the thermodynamic links

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Missing parts
  1. Answer
    E°(cell)
    Choices
    1. E°(cell)
    2. the current
    3. the concentration
  2. Answer
    equilibrium constant
    Choices
    1. equilibrium constant
    2. molar conductivity
    3. temperature
Complete the statement
The standard Gibbs energy of the cell reaction is −nF times {0}, and it is also equal to −RT times the natural log of the {1}.
Two relations connect the cell to its thermodynamics. Source: syllabus Chemistry Part I, Ch 2 Electrochemistry.

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