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For the reaction, C+O(2) rarr CO(2),D...

For the reaction,
`C+O_(2) rarr CO_(2),DeltaH=-393 J`
`2Zn + O_(2) rarr 2ZnO, H=-412 J`

A

Carbon reduce `ZnO` to `Zn`

B

Oxidation of carbon is not feasible

C

Oxidation of `Zn` is not feasible

D

`Zn` liberates more heat than carbon during oxidation

Text Solution

Verified by Experts

The correct Answer is:
B
`ZnO+CrarrZn+CO`
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For the reaction, C+O_(2)rarrCO_(2) , DeltaH=-393 J 2Zn+O_(2) rarr 2ZnO , DeltaH=-412J

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A2Z-CHEMICAL THERMODYNAMICS-Section D - Chapter End Test
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  2. Calcualte the maximum efficiency of an engine operating between110^(@)...

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  3. Five moles of anideal gas expends reversily from a volume of8dm^(3)at ...

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  4. Entropy change involve in conversion of 1 mole of liquid water at 373K...

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  5. What is the value ofDeltaE(heat change at constant volume)for reversib...

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  6. Which of the statement is correct?

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  7. The specific heats of iodine vapour and solid are 0.031 and 0.055 cal/...

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  8. Bond dissociation energy ofCH(3)-Hbond is103Kcalmol^(-1)and0.055cal//g...

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  9. Given,H(s)(g)=2H(g)Delta(H-H)=103kcalmol^(-1) CH(4)(g)=CH(3)(g)+H(g...

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  10. For the combustion of n-octane C(8)H(18)+O(2)rarrCO(2)+H(2)O at 25^(...

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  11. The enthapies of neutralisation of HClO(4)and Cl(3)C-COOHare -13.5kc...

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  12. The work done in erge for the reversible expansion of 1 mole of an ide...

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  13. If 900J//g of heat is exchanged at boiling point of water then water...

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  14. The enthalpy of formation of H(2)O(l) is -280.70 kJ/mol and enthalpy o...

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  15. One gram sample of NH(4)NO(3) is decomposed in a bomb calorimeter. The...

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  16. Calculate the resonance enegry of N(2)O form the following data Delt...

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  17. If a 298K the bond energies of C-H,C-C,C=C and H-H bonds are respectiv...

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  18. The enthalpies of formation of Al(2)O(3) and Cr(2)O(3) are -1596KJ and...

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  19. "The quanity of heat which must be supplied to decompose a compound in...

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  20. C("graphite")+O(2)(g)rarrCO(2)(g) deltaH=-94.05Kcalmol^(-1) C("dia...

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  21. Which of the follwing has lowest fusion temperature ?

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