2. Questions Bank
  3. NEET
  4. Chemistry
  5. Electrochemistry / विद्युत् रसायन

NEET Chemistry Electrochemistry / विद्युत् रसायन Question Bank Self Evaluation Test - Electrochemistry

  • question_answer
    An electrochemical cell is set up as: \[Pt;{{H}_{2}}(1\,atm)|HCl(0.1M)||C{{H}_{3}}COOH(0.1M)|{{H}_{2}}\](1atm); Pt. The e.m.f of this cell will not be zero, because 

    A) the temperature is constant

    B) e.m.f depends on molarities of acids used

    C) acids used in two compartments are different

    D) pH of \[0.1\text{ }M\text{ }HCl\] and \[0.1\,M\,C{{H}_{3}}COOH\] is not same

    Correct Answer: D

    Solution :

    [d] For a concentration cell having different concentrations of ions. \[E=-\frac{0.0591}{n}\log \frac{{{c}_{1}}}{{{c}_{2}}}\] If all the concentrations are identical then obviously the cell voltage is zero. But as the pH of 0.1 M \[HCl\] (strong acid) and pH of 0.1 M \[C{{H}_{3}}COOH\] is (weak acid) not same, therefore the cell voltage is not zero.


You need to login to perform this action.
You will be redirected in 3 sec spinner