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For the transition C(("diamonid")) rarr ...

For the transition `C_(("diamonid")) rarr C_(("graphite")) , Delta H = -1.5KJ`. It follows that

A

Graphite is stable than diamond

B

Diamond is stable than graphite

C

Graphite is an endothermic substance

D

Diamond is an exothermic substance

Text Solution

Verified by Experts

The correct Answer is:
A
`C_(d) rarr C_(g), Delta H lt 0 rArr H_(P)- H_(R ) lt 0 rArr H_(P) lt H_(R ) rArr` Graphite is more stable
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AAKASH SERIES-CHEMICAL THERMODYNAMICS-PRACTICE SHEET (EXERCISE- II) (LEVEL- I (MAIN) STRAIGHT OBJECTIVE TYPE QUESTIONS)
  1. Which are of the following is an exothermic reaction?

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  2. (A) : The reaction C + O(2) rarr CO(2) is an exothermic reaction Rea...

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  3. For the transition C(("diamonid")) rarr C(("graphite")) , Delta H = -1...

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  4. Which of the following equation represents standard heat of formation ...

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  5. Which of the following is not a combustion reaction

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  6. The chemical process involved in the combustion reactions is

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  7. MgSO(4(s)) + H(2)O rarr MgSO(4(aq)), Delta H = - 84K. Cals, Delta H of...

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  8. The heat change for the following reaction C((s)) + 2S((s)) rarr CS(2(...

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  9. N(2) + 3H(2) rarr 2NH(3), Delta H = - 46K. Cals. From the above reacti...

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  10. The enthalpies of HCl, NaOH ,NaCl and H(2)O are -120, -82, -148 and -6...

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  11. How much energy is released when 6 mole of octane is burnt in air? Giv...

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  12. What is theheat of formation of C(6)H(6), given that the heats of comb...

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  13. Heat of combustion of C(2)H(4) is -337 kCal. If 5.6 lit O(2) is used a...

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  14. For the following reaction H((aq))^(+) + OH((aq))^(-) rarr H(2)O((l)) ...

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  15. For the reaction 2H(2)O((l)) rarr H(3)O((aq))^(+) + OH((aq))^(-), the ...

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  16. The heat of neutralisation is maximum when

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  17. Assertion (A): Heat of neutralization of HClO(4) with NaOH is same as ...

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  18. In which of the following combinatins of HCL and NaOH, the heat energy...

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  19. The correct match is

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  20. Heat of neutralisation for the reaction NaOH + HCl rarr NaCl + H(2)O "...

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