The absolute enthalpy of neutralisation of the reaction: MgO (s) +2HCl (aq) →MgCl2(aq)+H2O(l) will be

1.  -57.3kJ mol-1

2.  Greater than -57.3kJ mol-1

3.  Less than -57.3kJ mol-1

4.  57.3kJ mol-1

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4
Correct Answer :

Less than -57.3kJ mol-1


Explanation :
No Explanation available for this question

For a reaction to proceed simultaneously.

1.  ΔH is +ve

2.  ΔS is +ve

3.  ΔG is – ve

4.  ΔG is +ve

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4
Correct Answer :

ΔG is – ve


Explanation :
No Explanation available for this question

The free energy change for the formation of magnesium oxide from its element sat 250C is -570.5kJ mol. Forreaction: 2 Mg (s) +O2(g)→2MgO(s)

1.  ΔG=-1141.0kJ

2.  ΔGθ=-1141.0kJ

3.  ΔGθ=1141.0kJ

4.  ΔGθ=0

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4
Correct Answer :

ΔG=-1141.0kJ


Explanation :
No Explanation available for this question

Which of the following quantities is not a state function

1.  Temperature

2.  Entropy

3.  Enthalpy

4.  Work

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4
Correct Answer :

Work


Explanation :
No Explanation available for this question

One mole of methanol when burnt inoxygen gives out 723 kJ mol-1 heat. If one mole of oxygen is used, what will be the amount of heat evolved

1.  723 kJ

2.  964 kJ

3.  482 kJ

4.  241 kJ

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4
Correct Answer :

482 kJ


Explanation :
No Explanation available for this question

For an equilibrium state.

1.  ΔH>0

2.  ΔG>0

3.  ΔH=TΔS

4.  ΔH>TΔS

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4
Correct Answer :

ΔH=TΔS


Explanation :
No Explanation available for this question

Which of the following statements is false

1.  Work is a state function

2.  Temperature is a state function

3.  Change in the state is completely defined when the initial and final ststes are specified

4.  Work appears at the boundary of the system

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4
Correct Answer :

Work is a state function


Explanation :
No Explanation available for this question

If ΔH and ΔU are the changes in enthalpy and internal energy when a liquid Is converted into its vapours at temperature T,then

1.  ΔH-ΔU=0

2.  ΔH-ΔU=22.4kJ/ mol

3.  ΔH-ΔU=RT

4.  ΔU-ΔH=RT

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4
Correct Answer :

ΔH-ΔU=RT


Explanation :
No Explanation available for this question

For reaction H2(g)+1/2O2(g)→H2O(l),Δ=-68 kcal The heat change for the decomposition of 7.2g of water is

1.  13.6 kcal

2.  27.2 kcal

3.  54.4 kcal

4.  -34 kcal

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4
Correct Answer :

27.2 kcal


Explanation :
No Explanation available for this question

Which of the following neutralisation reactions is most exothermic

1.  HCl and NaOH

2.  HCN and NaOH

3.  HCl and NH4OH

4.  CH3COOHand NH4OH

View Answer  
4
Correct Answer :

HCl and NaOH


Explanation :
No Explanation available for this question
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