ICSE Class 10 Modern Physics — Mock Test (2027)

Free online mock test for Modern Physics (ICSE Class 10 Physics) — 20 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.What happens to the nucleus during gamma (γ) emission, and do the atomic number or mass number change?
   • A.The nucleus releases excess energy as a γ-ray photon, and both the atomic number and mass number remain unchanged.
   • B.The nucleus loses a γ-ray photon, decreasing the atomic number by 1 but keeping the mass number the same.
   • C.The nucleus emits a γ-ray photon, causing the mass number to decrease by 1 while the atomic number stays constant.
   • D.The nucleus releases energy, increasing the atomic number by 1 and keeping the mass number unchanged.
2. 2.How much energy is released when a mass of 1 g is completely converted into energy? (Given, velocity of light c = 3 × 10⁸ m s⁻¹.)
   • A.3 × 10¹⁰ J
   • B.9 × 10¹³ J
   • C.3 × 10¹³ J
   • D.9 × 10¹⁰ J
3. 3.A radioactive element $_{Z}^{A}X$ first emits a β particle and then an alpha particle and the resulting nucleus can be represented $_{Q}^{P}Y$. What are the values of $P$ and $Q$ in terms of $A$ and $Z$?
4. 4.What is the primary source of energy of the sun or stars?
   • A.Combustion of fossil fuels
   • B.Nuclear fission reactions
   • C.Nuclear fusion reactions
   • D.Gravitational contraction
5. 5.Can it be concluded from beta decay that electrons exist inside the nucleus?
   • A.Yes, because beta particles are electrons emitted from the nucleus.
   • B.No, beta particles are created at the instant of decay and do not reside in the nucleus.
   • C.Yes, but only in unstable nuclei undergoing fission.
   • D.No, because electrons are too large to fit inside the nucleus.