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Thermodynamics & Thermochemistry

JEE Chemistry • 10 questions • Free on ExamBattle

Practice Questions

1. Q1

   For an exothermic reaction, ΔH is:

   • A. Positive
   • B. Negative
   • C. Zero
   • D. Undefined

2. Q2

   Hess's law is a consequence of which law of thermodynamics?

   • A. Zeroth law
   • B. First law
   • C. Second law
   • D. Third law

3. Q3

   The standard enthalpy of formation of an element in its standard state is:

   • A. 1 kJ/mol
   • B. Zero
   • C. Depends on element
   • D. -1 kJ/mol

4. Q4

   Entropy (S) of the universe in a spontaneous process:

   • A. Decreases
   • B. Increases
   • C. Remains constant
   • D. Becomes zero

5. Q5

   The Gibbs free energy equation is:

   • A. G = H + TS
   • B. G = H − TS
   • C. G = H × TS
   • D. G = H/TS

6. Q6

   For an isothermal expansion of an ideal gas, ΔU is:

   • A. Positive
   • B. Zero
   • C. Negative
   • D. Equal to work done

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