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.
What to expect: This mock test covers key concepts from the Modern Physics chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.Name the atoms of a substance having the same atomic number, but different mass numbers. Which of the following correctly identifies such atoms, provides an example, and describes their structural difference?
- A.Isobars. Example: Carbon-14 and Nitrogen-14. They differ in the number of protons.
- B.Isotopes. Example: Uranium-235 and Uranium-238. They differ in the number of neutrons in the nucleus.
- C.Isomers. Example: Glucose and Fructose. They differ in the arrangement of atoms.
- D.Isotones. Example: Carbon-12 and Oxygen-16. They differ in the number of protons but have the same neutrons.
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2.Calculate the energy released when 1 a.m.u. of mass is lost.
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3.A radioactive nucleus undergoes a series of decays according to the sequence $X \xrightarrow{-\beta} X_1 \xrightarrow{-\alpha} X_2 \xrightarrow{-\gamma} X_3$ If the mass number and atomic number of $X_3$ are 172 and 69 respectively, what is the mass number and atomic number of $X$?
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4.How much energy gets released when a mass of $1\,\mathrm{g}$ is converted completely into energy? (Given, velocity of light $(c) = 3 \times 10^8\,\mathrm{ms}^{-1}$.)
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5.What are isotopes?
- A.Atoms of the same element with the same atomic number but different mass numbers.
- B.Atoms of different elements with the same mass number but different atomic numbers.
- C.Atoms with the same number of neutrons but different numbers of protons.
- D.Atoms that have identical physical properties but differ in chemical properties.
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