Atoms and Nuclei (NEET Physics): Questions 4 - 10 of 67

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Passage

Read the passage given below and answer the questions that follow:

A gas of identical hydrogen like atoms has some atoms in ground state and some atoms in a particular excited state and there are no atoms in any other energy level. The atoms of the gas make transition to a higher energy state by absorbing monochromatic light of wavelength 304 Å. Subsequently, the atoms emit radiation of only six different photon energies. Some of emitted photons have wavelength 304 Å, some have wavelength more and some have less than 304 Å (Take h c = 12420 eV- Å)

Question number: 4 (1 of 3 Based on Passage) Show Passage

» Atoms and Nuclei » Energy Levels

MCQ▾

Question

Find the maximum and minimum energies of emitted photons (in eV)

Choices

Choice (4) Response

a.

10.4, 3.6

b.

20.4, 10.6

c.

40.8, 10.6

d.

Question does not provide sufficient data or is vague

Question number: 5 (2 of 3 Based on Passage) Show Passage

» Atoms and Nuclei » Hydrogen Spectrum

MCQ▾

Question

Find the principal quantum number of the initially excited

Choices

Choice (4) Response

a.

1

b.

3

c.

2

d.

4

Question number: 6 (3 of 3 Based on Passage) Show Passage

» Atoms and Nuclei » Energy Levels

MCQ▾

Question

Identify the gas (Z =? )

Choices

Choice (4) Response

a.

2

b.

1

c.

4

d.

3

Question number: 7

» Atoms and Nuclei » Alpha-Particle Scattering Experiment

MCQ▾

Question

An X-ray tube is operating at 100 kV. The minimum wavelength of X-ray and maximum velocity of the electrons striking the anti-cathode are,

Choices

Choice (4) Response

a.

0.098 Å, 1.658 × 10 8 m/s

b.

0.124 Å, 1.875 × 10 8 m/s

c.

0.322 Å, 3.624 × 10 8 m/s

d.

0.226 Å, 2.875 × 10 8 m/s

Question number: 8

» Atoms and Nuclei » Hydrogen Spectrum

MCQ▾

Question

Which of the following transitions in hydrogen atoms emit photons of highest frequency?

Choices

Choice (4) Response

a.

n = 1 to n = 2

b.

n = 2 to n = 6

c.

n = 6 to n = 2

d.

n = 2 to n = 1

Question number: 9

» Atoms and Nuclei » Alpha-Particle Scattering Experiment

MCQ▾

Question

An α- particle of 5 MeV energy strikes with a nucleus of uranium at stationary at an scattering angle of 180°. The nearest distance up to which α-particle reaches the nucleus will be closest to,

Choices

Choice (4) Response

a.

1012cm

b.

1 A

c.

1010cm

d.

1015cm

Question number: 10

» Atoms and Nuclei » Hydrogen Spectrum

MCQ▾

Question

Ratio of the wavelengths of first line of Lyman series and first line of Balmer series is

Choices

Choice (4) Response

a.

4: 9

b.

5: 27

c.

1: 3

d.

27: 5

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