MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The enthalpy of dilution of a solution is __________ on the original concentration of the solution and the amount of solvent added. |
| A. | dependent |
| B. | independent |
| C. | may be dependent |
| D. | may be independent |
| Answer» B. independent | |
| 2. |
Enthalpy of solution can either be positive or ________ |
| A. | negative |
| B. | does not exist |
| C. | 0 |
| D. | infinity |
| Answer» B. does not exist | |
| 3. |
Which of the following cycle allows has to analyze reaction energies? |
| A. | carbon cycle |
| B. | born Haber cycle |
| C. | nitrogen cycle |
| D. | chemical cycle |
| Answer» C. nitrogen cycle | |
| 4. |
Decomposition of sodium chloride into a sodium ion and chloride ion releases energy of 788 KJ per Mol, what is the energy called? |
| A. | lattice energy |
| B. | translation energy |
| C. | dilution energy |
| D. | neutralization energy |
| Answer» B. translation energy | |
| 5. |
Calculate the carbon carbon double bond energy in ethane from the following reaction, H2C=CH2(g) + H2(g) > H3C CH3(g) H = 138 kJ/mol. If Bond enthalpies are: C C = 348; H H = 436; C H = 412 in KJ/mol. |
| A. | 498 KJ/mol |
| B. | 593 KJ/mol |
| C. | 508 KJ/mol |
| D. | 598 KJ/mol |
| Answer» E. | |
| 6. |
In case of the decomposition of hydrogen molecule into two hydrogen atoms, the enthalpy of atomization is same as the _________ |
| A. | bond dissociation enthalpy |
| B. | enthalpy of formation |
| C. | enthalpy of combustion |
| D. | enthalpy of sublimation |
| Answer» B. enthalpy of formation | |
| 7. |
In which of the following reactions the energy released is not an enthalpy of atomization? |
| A. | decomposition of a hydrogen molecule into two hydrogen atoms |
| B. | decomposition of an oxygen molecule into 2 oxygen atoms |
| C. | formation of a water molecule |
| D. | decomposition of chlorine molecule |
| Answer» D. decomposition of chlorine molecule | |
| 8. |
The enthalpy of 435 KJ per Mol is obtained from the conversion of hydrogen molecule into two hydrogen atoms. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Calculate the heat of combustion of ethane, in the reaction C2H6(g) + 3 1/2O2(g) 2CO2(g) + 3H2O(l) where the heats of formation of ethane gas, carbon dioxide gas and water liquid are 84.7 kJ mol-1, -393.5 kJ mol-1 and 285.8 kJ mol-1 respectively. |
| A. | -1559.7 kJ mol<sup>-1</sup> |
| B. | -155.7 kJ mol<sup>-1</sup> |
| C. | -159.7 kJ mol<sup>-1</sup> |
| D. | -559.7 kJ mol<sup>-1</sup> |
| Answer» B. -155.7 kJ mol<sup>-1</sup> | |
| 10. |
Enthalpy of combustion as always ________ |
| A. | positive |
| B. | negative |
| C. | 0 |
| D. | infinity |
| Answer» C. 0 | |