AIPMT 2009 | Thermodynamics Question 45 | Chemistry

AIPMT 2009

MCQ (Single Correct Answer)

-1

From the following bond energies :
H $$-$$ H bond energy   : 431.37 kJ mol^$$-$$1
C $$=$$ C bond energy   : 606.10 kJ mol^$$-$$1
C $$-$$ C bond energy   : 336.49 kJ mol^$$-$$1
C $$-$$ H bond energy   : 410.50 kJ mol^$$-$$1
Enthalpy for the reaction,

AIPMT 2009 Chemistry - Thermodynamics Question 55 English

will be

$$-$$ 243.6 kJ mol^$$-$$1

$$-$$ 120.0 kJ mol^$$-$$1

553.0 kJ mol^$$-$$1

1523.6 kJ mol^$$-$$1

AIPMT 2008

MCQ (Single Correct Answer)

-1

Which of the following are not state functions ?
(I) q + w (II) q
(III) w (IV) H $$-$$ TS

(I), (II) and (III)

(II) and (III)

(I) and (IV)

(II), (III) and (IV)

AIPMT 2008

MCQ (Single Correct Answer)

-1

Bond dissociation enthalpy of H₂, Cl₂ and HCl are 434, 242 and 431 kJ mol^$$-$$1 respectively. Enthalpy of formation of HCl is

$$-$$ 93 kJ mol^$$-$$1

245 kJ mol^$$-$$1

93 kJ mol^$$-$$1

$$-$$ 245 kJ mol^$$-$$1

AIPMT 2008

MCQ (Single Correct Answer)

-1

For the gas phase reaction,

PCl_5(g) $$\rightleftharpoons$$ PCl_3(g) + Cl_2(g)

which of the following conditions are correct ?

$$\Delta $$H < 0 and $$\Delta $$S < 0

$$\Delta $$H > 0 and $$\Delta $$S < 0

$$\Delta $$H = 0 and $$\Delta $$S < 0

$$\Delta $$H > 0 and $$\Delta $$S > 0

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