# 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

4

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

4

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

4

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

4

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

4

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

4

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

4

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

4

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

4

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

4