Atoms and Nuclei (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 16 - 19 of 69

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Question number: 16

» Atoms and Nuclei » Alpha-Particle Scattering Experiment

Assertion-Reason▾

Assertion (Ꭺ)

The force of repulsion between atomic nucleus and α -particle varies with distance according to inverse square law.

Reason (Ꭱ)

Rutherford did α -particle scattering experiment.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 17

» Atoms and Nuclei » Bohr Model

MCQ▾

Question

In the Bohr model of the hydrogen atom, let R, v and E represent the radius of the orbit, the speed of electron and the total energy of the electron respectively. Which of the following quantity is proportional to the quantum number?

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 18

» Atoms and Nuclei » Bohr Model

MCQ▾

Question

In a hypothetical Bohr hydrogen, the mass of the electron is doubled. The energy E 0 and the radius r 0 of the first orbit will be (a 0 is the Bohr radius)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 19

» Atoms and Nuclei » Hydrogen Spectrum

MCQ▾

Question

Which of the series of hydrogen spectrum are not in the visible region?

(1) Lyman series (2) Paschen series

(3) Bracket series (4) Balmer series

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 3 are correct

c.

1 and 2 are correct

d.

1, 2 and 3 are correct

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