ICSE Class 10 Structure of Atom — Mock Test (2027)
Free online mock test for Structure of Atom (ICSE Class 10 Chemistry) — 111 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 Structure of Atom 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.The maximum number of electrons that can be accommodated in the principal shell n = 3 (using 2n^2) is:
- A.9
- B.18
- C.6
- D.32
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2.An orbital is described by the quantum numbers n = 4, l = 2. To which subshell does it belong and how many orbitals does that subshell contain?
- A.4p subshell, 3 orbitals
- B.4d subshell, 5 orbitals
- C.4f subshell, 7 orbitals
- D.4s subshell, 1 orbital
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3.Using En = -13.6/n^2 eV, the energy of the electron in the n = 3 orbit of hydrogen is approximately:
- A.-1.51 eV
- B.-13.6 eV
- C.-3.40 eV
- D.-4.53 eV
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4.Using En = -2.18 x 10^-18 / n^2 J for the hydrogen atom, the energy associated with the fifth orbit (n = 5) is:
- A.-8.72 x 10^-20 J
- B.-2.18 x 10^-18 J
- C.-4.36 x 10^-19 J
- D.-1.09 x 10^-18 J
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5.The charge on the electron was determined by which experiment?
- A.Oil drop experiment
- B.Alpha particle scattering experiment
- C.Cathode ray experiment
- D.Black body radiation experiment
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