# For the reaction :C2H4(g)+3O2(g)→2CO2(g)+2H2O(l)at 298K. ΔU=-1415kJ. If R=0.0084kJ K-1,then ΔH is equal to

1.  -1400 kJ

2.  -1410 kJ

3.  -1420 kJ

4.  -1430 kJ

4

-1410 kJ

Explanation :
No Explanation available for this question

# The enthalpy of neutralisation of NH4OH and HCl is

1.  57.1kJ mol-1

2.

3.  >57.1kJmol-1

4.  Zero

4

Explanation :
No Explanation available for this question

# If S+O2→SO2,ΔH=-298.2kJ, SO2+1/2O2→SO3,ΔH=-98.2kJ, SO3+H2O→H2OSO4ΔH=-130.2kJ, H2+12O2→H2O,ΔH=-287.3Kj , the enthalpy of formation of H2SO4at 298K will be

1.  -433.7 kJ

2.  -650.3 kJ

3.  +320.5 kJ

4.  -813.9 kJ

4

-813.9 kJ

Explanation :
No Explanation available for this question

# If q is the heat added to the system. w is the work done by the system abd ΔEis the change in internal energy, then according to first law of thermodynamics

1.  ΔU=q+w

2.  ΔU=q-w

3.  ΔU=q+pΔV

4.  ΔU=q+ΔH

4

ΔU=q-w

Explanation :
No Explanation available for this question

# The total entropy change for a system and its surroundings increases, if the process is

1.  Reversible

2.  Irreversible

3.  Exothermic

4.  Endothermic

4

Irreversible

Explanation :
No Explanation available for this question

# Which of the following processes is not accompanied by increase of entropy

1.  Dissolution of NH4Cl in water

2.  Burning of rocket fuel

3.  Sublimation of dry ice

4.  Condensing steam

4

Condensing steam

Explanation :
No Explanation available for this question

# 24 S+32O2→SO3+2x kcal, SO2+12O2→SO3+y kcal find out the heat of formation of SO2

1.  (2x- y)

2.  (2x + y)

3.  (x +y)

4.  2x/y

4

(2x- y)

Explanation :
No Explanation available for this question

# Thermodynamic equilibrium involves

1.  Chemical equilibrium

2.  Mechanical equilibrium

3.  Thermal equilibrium

4.  All of the above simultaneously

4

All of the above simultaneously

Explanation :
No Explanation available for this question

# A reaction occurs spontaneously if

1.  TΔS

2.  TΔS>ΔH and ΔH is +ve and ΔS is – ve

3.  TΔS>ΔH and both ΔH and ΔS are +ve

4.  TΔS=ΔH and both ΔH and ΔS are +ve

4

TΔS>ΔH and both ΔH and ΔS are +ve

Explanation :
No Explanation available for this question

# Which of the following is not an intensive property

1.  Entropy

2.  Pressure

3.  Temperature

4.  Molar volume

4

Entropy

Explanation :
No Explanation available for this question

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