Chemistry 9 Chapter 2 Practice Test 3

ByMuhammad Zaman
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Class 9 Chemistry

Chapter 2

Practice MCQs Test No 3

1 / 10

Alpha particles which were deflected backward in Rutherford’s experiment were hit upon by

2 / 10

When an electron changes its orbit from higher to lower, energy is

3 / 10

Electrons revolve only in those orbits with angular momentum as an

4 / 10

Which of the following is a defect of Rutherford atomic model?

5 / 10

Rutherford use ________ as a source of alpha particles.

6 / 10

Maximum number of electrons in a shell can be calculated by

7 / 10

Almost entire mass of an atom is concentrated in the

8 / 10

The value of Planks constant is

9 / 10

The energy of an electron in an orbit is proportional to

10 / 10

The word isotopes was first used by scientist

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3 Comments

  1. Amazing tests everyone!!
    You should literally try this if you want to get full marks in exams ✨

    Reply

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