Chemistry - Grade 12 -2023 G.C

Grade 12 students can now access their exam results by visiting the Educational Assessment and Examination Services (EAES) website.


55. Which one of the following is responsible for electrolytic conductivity?

  1. Movement of ions.
  2. Electrons held in a fixed position.
  3. Free electrons.
  4. Ions strongly held in a fixed position.


56. The pH of a 0.1 M solution of formic acid (HCOOH) is 3. What is the Ka of the acid?

  1. 9.99 x 10-5
  2. 9.99 x 10-4
  3. 1.01 x 10-7
  4. 1.01 x 10-5


57. A system does 15 J of work and no other changes take place. Which of the following function has fallen by 15 J?

  1. Entropy
  2. Enthalpy
  3. Specific heat
  4. Internal energy


58. Which of the following is CORRECTLY stated about the spontaneity of a reaction?

  1. For an exothermic reaction with negative reaction entropy, the reaction is spontaneous at high temperature.
  2. For an endothermic reaction with positive reaction entropy, the reaction is non-spontaneous at low temperature.
  3. For an exothermic reaction with positive reaction entropy, the reaction is non-spontaneous at all temperature.
  4. For an endothermic reaction with negative reaction entropy, the reaction is spontaneous at all temperature.


59. In thermodynamics: solutions in a beaker, a gas in a cylinder, a reaction vessel, a biological cell are examples of a

  1. thermodynamic system
  2. path function
  3. state function
  4. thermodynamic variables


We have provided these questions from previous years grade 12 Ethiopian Secondary School Leaving Certificate Examination (ESSLCE) exams with the sole purpose of assisting students in their studies and preparations for upcoming exams. Please be aware that these questions are not indicative of future exam content. Good luck with your studies!

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