ICSE Class 10 Atoms — Mock Test

Free online mock test for Atoms (ICSE Class 10 Physics) — 72 competency-based questions with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.Assertion (A): Rutherford's nuclear model pictures electrons revolving around the nucleus like planets around the sun. Reason (R): The electrostatic attraction between the nucleus and the electrons supplies the centripetal force for their orbits.
   • A.Both A and R are true and R is the correct explanation of A
   • B.Both A and R are true but R is NOT the correct explanation of A
   • C.A is true but R is false
   • D.A is false but R is true
2. 2.The energy of the electron in the n = 3 level of a hydrogen atom is:
   • A.-4.53 eV
   • B.-1.51 eV
   • C.-3.40 eV
   • D.-0.85 eV
3. 3.Using En = -13.6/n^2 eV, the energy of the electron in the n = 2 level of a hydrogen atom is:
   • A.-3.40 eV
   • B.-13.6 eV
   • C.-6.80 eV
   • D.-1.51 eV
4. 4.For the hydrogen atom, the energy needed to excite the electron from the ground state (n = 1) to the second excited state (n = 3) is about:
   • A.10.2 eV
   • B.12.09 eV
   • C.1.51 eV
   • D.13.6 eV
5. 5.The radius of the innermost (n = 1) electron orbit of a hydrogen atom is 5.3 x 10^-11 m. The radius of the n = 2 orbit is:
   • A.10.6 x 10^-11 m
   • B.21.2 x 10^-11 m
   • C.47.7 x 10^-11 m
   • D.5.3 x 10^-11 m