Skip to main content
HardChemistry
+4 / -1
When ethyne is passed through a red hot tube, then formation of benzene takes place - ΔHf°(C₂H₂)(g) = 230 kJ mol⁻¹ ΔHf°(C₆H₆)(g) = 85 kJ mol⁻¹ Calculate the standard heat of trimerisation of ethyne to benzene. 3 C₂H₂(g) ⟶ C₆H₆(g)
A
205 kJ mol⁻¹
B
605 kJ mol⁻¹
C
−605 kJ mol⁻¹
D
−205 kJ mol⁻¹
Previous

Under certain conditions, the value of ΔG for a hypothetical reaction, X + Y ⟶ Z

Next

The enthalpy of combustion at 25°C of H₂, cyclohexane (C₆H₁₂) and cyclohexene (C

More from Thermodynamics
Hard

Which of the following is correct option for free expansion of an ideal gas under adiabatic conditio

Hard

Under the same conditions how many ml of 1 M KOH and 0.5 M H₂SO₄ solutions respectively when mixed f

Hard

1 gm H₂ gas at S.T.P. is expanded so that volume is doubled. Hence work done is -

Hard

The lattice enthalpy and hydration enthalpy of four compounds are given below – Compound Lattice ent

Hard

Standard enthalpies of formation of O₃, CO₂, NH₃ and HI are 142.2, −393.2, −46.2 and +25.9 kJ mol⁻¹

Hard

Consider the following reactions at 1000°C - I. Zn(s) + 1/2 O₂(g) → ZnO(s); ΔG° = −360 kJ mol⁻¹ II.

Practice Chemistry Exams

Full-length mock tests with detailed analytics, rank, and percentile.

Browse Exams