ICSE Class 10 Thermodynamics — Mock Test

Free online mock test for Thermodynamics (ICSE Class 10 Physics) — 130 competency-based questions with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.Assertion (A): The internal energy of a given mass of gas depends only on its state, not on the path taken to reach that state. Reason (R): Internal energy is a thermodynamic state variable.
   • 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
2. 2.A Carnot engine absorbs 1000 J from a source at 400 K and rejects heat to a sink at 300 K. Using Q1/Q2 = T1/T2, how much heat is rejected to the sink per cycle?
   • A.250 J
   • B.750 J
   • C.1333 J
   • D.700 J
3. 3.Spontaneous processes of nature are generally:
   • A.reversible
   • B.irreversible
   • C.quasi-static
   • D.adiabatic
4. 4.In the First Law dQ = dU + dW, the convention used in this chapter is that dW is the work done:
   • A.on the system by the surroundings
   • B.by the system on the surroundings
   • C.always equal to zero
   • D.only by friction
5. 5.Match each process with the quantity that is zero: isothermal of an ideal gas, isochoric, adiabatic. Which set is correct?
   • A.isothermal: dU = 0; isochoric: dW = 0; adiabatic: dQ = 0
   • B.isothermal: dQ = 0; isochoric: dU = 0; adiabatic: dW = 0
   • C.isothermal: dW = 0; isochoric: dQ = 0; adiabatic: dU = 0
   • D.isothermal: dQ = 0; isochoric: dW = 0; adiabatic: dU = 0