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.A fusion reaction is represented as follows: $$^{2}\mathrm{H} + ^{2}\mathrm{H} \longrightarrow ^{4}\mathrm{He} + x$$ Identify $$x$$.
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2.The isotope of $_{92}^{238}\mathrm{U}$ decays by alpha emission to an isotope of thorium (Th). The thorium isotope then decays by beta emission to an isotope of Protactinium (Pa). Which of the following correctly represents these two nuclear changes?
- A.$_{92}^{238}\mathrm{U} \rightarrow _{90}^{234}\mathrm{Th} \rightarrow _{91}^{234}\mathrm{Pa}$
- B.$_{92}^{238}\mathrm{U} \rightarrow _{91}^{234}\mathrm{Th} \rightarrow _{92}^{234}\mathrm{Pa}$
- C.$_{92}^{238}\mathrm{U} \rightarrow _{88}^{234}\mathrm{Th} \rightarrow _{89}^{234}\mathrm{Pa}$
- D.$_{92}^{238}\mathrm{U} \rightarrow _{90}^{238}\mathrm{Th} \rightarrow _{91}^{238}\mathrm{Pa}$
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3.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.
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4.An atomic nucleus denoted by $\frac{A}{Z}X$ emits an alpha particle. Which equation shows the correct formation of the daughter product?
- A.$\frac{A}{Z}X \longrightarrow \frac{A-4}{Z-2}Y + \frac{4}{2}He + \text{energy}$
- B.$\frac{A}{Z}X \longrightarrow \frac{A}{Z-2}Y + \frac{4}{2}He + \text{energy}$
- C.$\frac{A}{Z}X \longrightarrow \frac{A-4}{Z}Y + \frac{4}{2}He + \text{energy}$
- D.$\frac{A}{Z}X \longrightarrow \frac{A-2}{Z-4}Y + \frac{4}{2}He + \text{energy}$
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5.Assertion : Out of $\alpha$, $\beta$ and $\gamma$ radiation, $\alpha$-particles have maximum penetrating power. Reason : The $\alpha$-particles are the heaviest amongst the three. (a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. (b) Both Assertion and Reason are True and Reason is not the correct explanation of Assertion. (c) Assertion is false but reason is true. (d) Assertion is true but reason is false.
- a.Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- b.Both Assertion and Reason are True and Reason is not the correct explanation of Assertion.
- c.Assertion is false but reason is true.
- d.Assertion is true but reason is false.
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