Chemistry 9 Chapter 2 Practice Test 3

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Class 9 Chemistry

Chapter 2

Practice MCQs Test No 3

1 / 10

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

2 / 10

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

3 / 10

The word isotopes was first used by scientist

4 / 10

The value of Planks constant is

5 / 10

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

6 / 10

The energy of an electron in an orbit is proportional to

7 / 10

Rutherford use ________ as a source of alpha particles.

8 / 10

Maximum number of electrons in a shell can be calculated by

9 / 10

Almost entire mass of an atom is concentrated in the

10 / 10

Electrons revolve only in those orbits with angular momentum as an

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