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Class 9 Chemistry · Chapter 2 · Test 6

Modern View of Atom

25 MCQs covering Rutherford’s experiment, Bohr’s atomic model, limitations of atomic models, and key concepts of modern atomic structure.

MCQs

25 questions · 20 min · 25 marks

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Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

  1. Question 1

    Which scientist proposed the nuclear model of the atom?

    • AJ J Thomson
    • BErnest Rutherford
    • CJohn Dalton
    • DNiels Bohr
    Show answer

    Answer: B

    Rutherford proposed the nuclear model after his gold foil experiment

  2. Question 2

    What did Rutherford use in his famous scattering experiment?

    • AAlpha particles
    • BElectrons
    • CProtons
    • DNeutrons
    Show answer

    Answer: A

    He directed alpha particles at a thin gold foil to study how they scattered

  3. Question 3

    What did most alpha particles do when passing through gold foil?

    • ABounced straight back
    • BPassed through with little or no deflection
    • CStopped inside the foil
    • DChanged into electrons
    Show answer

    Answer: B

    Most alpha particles passed through showing that atoms are mostly empty space

  4. Question 4

    What did the deflection of a few alpha particles indicate?

    • AThe atom has no nucleus
    • BThe atom is a solid sphere
    • CPositive charge is concentrated in a small nucleus
    • DElectrons are inside the nucleus
    Show answer

    Answer: C

    Large deflections showed that positive charge and most atomic mass are concentrated in a tiny nucleus

  5. Question 5

    Which model described the atom as a positively charged sphere with electrons embedded in it?

    • ABohr model
    • BThomson model
    • CRutherford model
    • DQuantum mechanical model
    Show answer

    Answer: B

    Thomson proposed the plum pudding model with electrons embedded in positive matter

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