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.Which of the radiations α, β and γ is similar to a beam of electrons?
- A.α-radiation, because it consists of helium nuclei.
- B.β-radiation, because it consists of high-energy electrons.
- C.γ-radiation, because it is a form of electromagnetic waves.
- D.All three radiations, as they all carry negative charge.
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2.The half-life of strontium-90 is 29 years. Given the table below, what are the missing values for mass and time?
Mass of strontium-90 in g Time in years 1600 0 ………………… 29 400 ………………… - A.Mass = 800 g at 29 years; Time = 48 years for 400 g
- B.Mass = 800 g at 29 years; Time = 58 years for 400 g
- C.Mass = 400 g at 29 years; Time = 58 years for 200 g
- D.Mass = 1200 g at 29 years; Time = 87 years for 400 g
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3.If radium (${}^{219}\mathrm{Ra}$) undergoes a further disintegration and emits two beta particles, which equation correctly represents this reaction?
- A.${}^{219}\mathrm{Ra} \longrightarrow {}^{219}\mathrm{Th} + 2 \cdot {}^{0}_{-1}e$
- B.${}^{219}\mathrm{Ra} \longrightarrow {}^{215}\mathrm{Rn} + 2 \cdot {}^{4}_{2}He$
- C.${}^{219}\mathrm{Ra} \longrightarrow {}^{219}\mathrm{Fr} + 2 \cdot {}^{0}_{-1}e$
- D.${}^{219}\mathrm{Ra} \longrightarrow {}^{223}\mathrm{Th} + 2 \cdot {}^{0}_{-1}e$
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4.Compare the ionizing power of gamma radiations with that of alpha and beta particles. Which of the following statements correctly describes their relative ionizing power?
- A.Gamma radiations have the highest ionizing power, followed by alpha and then beta particles.
- B.Gamma radiations have the lowest ionizing power, roughly 10^-4 times that of alpha and 10^-2 times that of beta particles.
- C.Alpha particles have the lowest ionizing power, while gamma and beta particles have similar ionizing power.
- D.Beta particles have the highest ionizing power, followed by gamma and then alpha particles.
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5.The diagram below shows the atomic model of $^{23}_{11}\mathrm{Na}$. Which labelled part in the diagram represents the neutrons in the nucleus?
- A.The particles with positive charge in the nucleus
- B.The particles with no charge in the nucleus
- C.The electrons revolving in the outermost shell
- D.The negatively charged particles in the inner shells
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