ICSE Class 10 Structure of Atom — Mock Test

Free online mock test for Structure of Atom (ICSE Class 10 Chemistry) — 111 competency-based questions with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.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
2. 2.According to Bohr's model, the angular momentum of an electron in a stationary state is an integral multiple of what quantity?
   • A.h
   • B.h divided by 2 pi
   • C.2 pi divided by h
   • D.h times 2 pi
3. 3.Which of the following statements about quantum numbers is INCORRECT?
   • A.For a given value of n, the azimuthal quantum number l can range from 0 to (n - 1)
   • B.For a given value of l, there are (2l + 1) permitted values of the magnetic quantum number ml
   • C.The spin quantum number ms can take the values +1/2 or -1/2
   • D.For a given value of n, l can take any integral value up to n
4. 4.Assertion (A): The emission spectrum of atoms in the gas phase is a line spectrum rather than a continuous spectrum. Reason (R): Electronic energy levels in an atom are quantised.
   • 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
5. 5.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