MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 29 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which one is not state function |
| A. | Internal energy |
| B. | Enthalpy |
| C. | Gibbs free energy |
| D. | Work |
| Answer» E. | |
| 2. |
If ?H value is less than zero than reaction will be |
| A. | Exothermic |
| B. | Endothermic |
| C. | May or may not be Exothormic or Endothermic |
| D. | None of these |
| Answer» B. Endothermic | |
| 3. |
If internal energy of the system is increased |
| A. | Change in state of the system is increased |
| B. | Temperature of the ystem may rise |
| C. | Chemical reaction may take place |
| D. | All |
| Answer» E. | |
| 4. |
Which is true for a spontaneous endothermic process? |
| A. | ?H<0 |
| B. | ?G<0 |
| C. | ?S<0 |
| D. | ?G>0 |
| Answer» C. ?S<0 | |
| 5. |
A reaction has values of ?H and ?S which are both positive. The reaction |
| A. | Is spontaneous |
| B. | Spontaneity is temperature dependent |
| C. | Has an increasing free energy |
| D. | Is non-spontaneous |
| Answer» E. | |
| 6. |
________________ is study about energy of a chemical system |
| A. | Thermochemistry |
| B. | Thermodynamics |
| C. | Chemical kinetics |
| D. | Stoichiometry |
| Answer» B. Thermodynamics | |
| 7. |
Which one of the following is a state function? |
| A. | Pressure |
| B. | Temperature |
| C. | Enthalpy |
| D. | All of the above |
| Answer» E. | |
| 8. |
When enthalpy of reactants is higher than product then reaction will be |
| A. | Endothermic |
| B. | Spontaneous |
| C. | Non-spontaneous |
| D. | Exothermic |
| Answer» E. | |
| 9. |
Enthalpy of combustion for food fuel and other compounds can be measured accurately by |
| A. | Glass calorimeter |
| B. | Bomb calorimeter |
| C. | Thermometer |
| D. | Manometer |
| Answer» C. Thermometer | |
| 10. |
Enthalpy of a reaction can be measured by |
| A. | Glass calorimeter |
| B. | Manometer |
| C. | Barometer |
| D. | Thermometer |
| Answer» B. Manometer | |
| 11. |
The attice energy of NaCl is |
| A. | ?787 KJ/mole |
| B. | 787 J/mole |
| C. | 780 KJ/mole |
| D. | 790 KJ/mole |
| Answer» B. 787 J/mole | |
| 12. |
?H of a system can be calculated by which of following relationship |
| A. | Q=m x s x ?T |
| B. | Q=?E |
| C. | Q=m x v x ?T |
| D. | Q = pv |
| Answer» B. Q=?E | |
| 13. |
Most of thermodynamic parameters are |
| A. | System |
| B. | Surrounding |
| C. | Phase |
| D. | State functions |
| Answer» E. | |
| 14. |
Change in enthalpy (H) of a system can be calculated by following relationship |
| A. | ?H=?E+P?V |
| B. | ?H=?E-PV |
| C. | ?H=?E-q |
| D. | ?H=?E+q |
| Answer» B. ?H=?E-PV | |
| 15. |
Two fundamental ways to transfer energy are |
| A. | Pressure and temperature |
| B. | Pressure and volume |
| C. | Heat and work |
| D. | Heat and volume |
| Answer» D. Heat and volume | |
| 16. |
Which of the following processes has always ?H = -ve |
| A. | Formation of compound |
| B. | Combustion |
| C. | Dissolution of ionic compound |
| D. | Dilution of a solution |
| Answer» C. Dissolution of ionic compound | |
| 17. |
Enthalpy change can be |
| A. | Calculated by Hess law |
| B. | Can be measured by calorimeter |
| C. | Both a and b |
| D. | None |
| Answer» D. None | |
| 18. |
If there is interconversion of solid and liquid states then |
| A. | ?V = 0 |
| B. | ?H= ?E |
| C. | ?H > ?E |
| D. | Both a & b |
| Answer» C. ?H > ?E | |
| 19. |
In order to determine ?hlatt of ionic compound which is correct relationship |
| A. | ?hlatt = ?Hf - ?Hx |
| B. | ?hlatt = ?Hf + ?Hx |
| C. | ?hlatt = ?Ha + ?Hv |
| D. | ?hlatt = ?Hf - ?hsol |
| Answer» B. ?hlatt = ?Hf + ?Hx | |
| 20. |
Hess law can be applied to determine |
| A. | ?Hf |
| B. | ?Hlatt |
| C. | ?Hcomb |
| D. | All of the above |
| Answer» E. | |
| 21. |
The environment in which a system is studied is |
| A. | State function |
| B. | Phase |
| C. | Surrounding |
| D. | State |
| Answer» D. State | |
| 22. |
Unit of heat in SI system is |
| A. | J |
| B. | KCaL |
| C. | Cal |
| D. | GJ |
| Answer» B. KCaL | |
| 23. |
Anything which depends upon initial and final state of a system is |
| A. | Environment |
| B. | Surrounding |
| C. | State function |
| D. | Enthalpy |
| Answer» D. Enthalpy | |
| 24. |
Total energy of a system is |
| A. | P.E + K.E |
| B. | P.E + heat energy |
| C. | K.E + heat energy |
| D. | P.E + mechanical energy |
| Answer» B. P.E + heat energy | |
| 25. |
Mathematical form of first law of thermodynamics is |
| A. | ?H=qp |
| B. | ?E = q + W |
| C. | ?E = q x v |
| D. | All of the above |
| Answer» C. ?E = q x v | |
| 26. |
Reaction in which heat evolves is called |
| A. | Endothermic |
| B. | Spontaneous |
| C. | Non-spontaneous |
| D. | Exothermic |
| Answer» E. | |
| 27. |
CuSO4 + Zn?ZnSO4+Cu is |
| A. | Spontaneous reaction |
| B. | Non-spontaneous reaction |
| C. | Endothermic |
| D. | Exothermic |
| Answer» B. Non-spontaneous reaction | |
| 28. |
Pumping of water uphill is |
| A. | Spontaneous process |
| B. | Non-spontaneous process |
| C. | Irreversible process |
| D. | Reversible process |
| Answer» C. Irreversible process | |
| 29. |
State function the macroscopic property of system depends upon |
| A. | Path of reaction |
| B. | Initial state |
| C. | Final state |
| D. | Initial and final state |
| Answer» E. | |