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Chemical Energetics Thermochemistry Test Online MCQs

Test Name Chemical Energetics Thermochemistry Test
Subject Chemistry
Test Type MCQs
Total Question 15
Total Marks 30
Total Time 15 Mints
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Attempt Chemical Energetics Thermochemistry Test Online MCQs to increase knowledge about the Chemical energetics and Thermochemistry and their mechanism. Get preparation of all the entrance tests, competitive tests, medical tests, engineering tests, admission tests and competitive tests.

Chemical Energetics Thermochemistry Test Online MCQs


1. The internal energy of a substance:


Question 1 of 15

2. For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, ∆U and w corresponds to:


Question 2 of 15

3. Enthalpy of neutralisation of CH₃COOH by NaOH is –50.6 kJ/mol and the heat of neutralization of a strong acid with NaOH is -55.9 kJ/mol. The value of ∆H for the ionization of CH₃COOH is:


Question 3 of 15

4. At 80°C, distilled water (H₃O⁺) has concentration equal to 1 x 10⁻⁶ mole/liter. The value of Kw, at this temperature will be


Question 4 of 15

5. In the exothermic reaction, the enthalpy of reaction is always:


Question 5 of 15

6. The heat of combustion of yellow phosphorous is – 9.91 kJ and of red phosphorous is – 8.78 kJ. The heat of transition of yellow phosphorus to red phosphorus is:


Question 6 of 15

7. The potential energy diagram for a reaction RP is given below




H° of the reaction corresponds to the energy:

Question 7 of 15

8. A gas expands isothermally against a constant external pressure of 1 atm from a volume of 10 dm³ to a volume of 20 dm³. It absorbs 300 J of thermal energy from its surrounding. The ∆U is:


Question 8 of 15

9. For a reaction to be spontaneous at all temperatures


Question 9 of 15

10. The enthalpy change (∆H) for the reaction, N₂(g) + 3H₂(g) 2NH₃(g) is -92.38 kJ at 298 K. The internal energy change ∆U at 298 K is:


Question 10 of 15

11. Which of the following is arranged in the increasing order of enthalpy of vaporisation?


Question 11 of 15

12. One mole of an ideal gas for which C= (3/2)R is heated reversibly at a constant pressure of 1 atm from 25°C to 100°C. The ∆H is:


Question 12 of 15

13. The enthalpy change of a reaction does not depend on:


Question 13 of 15

14. For a spontaneous process, entropy:


Question 14 of 15

15. S + O₂ SO₂ + x kcal             ……………(1)

SO₂ + ½O₂ SO₃ + y Kcal               ……………(2)

The heat of formation of SO₃ in the above reaction is:


Question 15 of 15


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