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.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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2.Consider the statements: (I) The mass of cathode ray particles depends on the gas in the discharge tube. (II) The mass of positive (canal) ray particles depends on the gas in the discharge tube. Which statement(s) is/are correct?
- A.Only I
- B.Only II
- C.Both I and II
- D.Neither I nor II
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3.The energy of an electron in the first orbit of He+ compared to the first orbit of the hydrogen atom is approximately what factor?
- A.The same
- B.Two times more negative
- C.Four times more negative
- D.Half as negative
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4.For the He+ ion, the energy associated with the first orbit (n = 1, Z = 2), using En = -(2.18 x 10^-18) Z^2 / n^2 J, is:
- A.-8.72 x 10^-18 J
- B.-2.18 x 10^-18 J
- C.-4.36 x 10^-18 J
- D.-1.09 x 10^-18 J
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5.How many d orbitals are present in a d sub-shell?
- A.Three
- B.Five
- C.Seven
- D.One
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