ICSE Class 10 Thermodynamics — Mock Test

Free online mock test for Thermodynamics (ICSE Class 10 Chemistry) — 96 competency-based questions with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.The enthalpy of fusion of ice is 6.0 kJ/mol and it melts at 273 K. Assuming the process is reversible, the entropy change for melting of 1 mol of ice is:
   • A.-21.98 J/K/mol
   • B.0.022 J/K/mol
   • C.21.98 J/K/mol
   • D.1638 J/K/mol
2. 2.Assertion (A): The enthalpy change of a reaction is the same whether it occurs in one step or in several steps. Reason (R): Enthalpy is a state function, so the enthalpy change is independent of the path between reactants and products.
   • A.Both A and R are true and R is the correct explanation of A
   • B.Both A and R are true but R is NOT the correct explanation of A
   • C.A is true but R is false
   • D.A is false but R is true
3. 3.The direct conversion of a solid into its vapour is described by the:
   • A.Enthalpy of fusion
   • B.Enthalpy of vaporisation
   • C.Enthalpy of sublimation
   • D.Enthalpy of solution
4. 4.The enthalpy of combustion of carbon to CO2 is minus 393.5 kJ per mol. The heat released on the formation of 35.2 g of CO2 from carbon and dioxygen gas is approximately (molar mass of CO2 is 44 g per mol):
   • A.315 kJ
   • B.393.5 kJ
   • C.493 kJ
   • D.157 kJ
5. 5.During the free expansion of an ideal gas into vacuum (pex = 0) at constant temperature:
   • A.Both q and w are positive
   • B.w = 0, q = 0 and DU = 0
   • C.w is large and negative
   • D.DU is positive