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1. \(16\lambda\)

2. \(2\lambda\)

3. \(4\lambda\)

4. \(9\lambda\)

Subtopic: Â Spectral Series |

Â 59%

From NCERT

NEET - 2023

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The radius of inner most orbit of a hydrogen atom is \(5.3 \times 10^{-11}\) m. What is the radius of the third allowed orbit of a hydrogen atom?

1. | \(4.77~ \mathring{A}\) | 2. | \(0.53~ \mathring{A}\) |

3. | \(1.06~ \mathring{A}\) | 4. | \(1.59~ \mathring{A}\) |

Subtopic: Â Bohr's Model of Atom |

Â 70%

From NCERT

NEET - 2023

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The ground state energy of a hydrogen atom is \(-13.6~\text{eV}\). The energy needed to ionize the hydrogen atom from its second excited state will be:

1. \(13.6~\text{eV}\)

2. \(6.8~\text{eV}\)

3. \(1.51~\text{eV}\)

4. \(3.4~\text{eV}\)

1. \(13.6~\text{eV}\)

2. \(6.8~\text{eV}\)

3. \(1.51~\text{eV}\)

4. \(3.4~\text{eV}\)

Subtopic: Â Bohr's Model of Atom |

Â 58%

From NCERT

NEET - 2023

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The wavelength of Lyman series of hydrogen atom appears in:

1. | visible region |

2. | far infrared region |

3. | ultraviolet region |

4. | infrared region |

Subtopic: Â Spectral Series |

Â 77%

From NCERT

NEET - 2023

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The angular momentum of an electron moving in an orbit of a hydrogen atom is \(1.5\left(\dfrac h\pi\right).\) The energy in the same orbit is nearly:

1. \(-1.5~\text{eV}\)

2. \(-1.6~\text{eV}\)

3. \(-1.3~\text{eV}\)

4. \(-1.4~\text{eV}\)

1. \(-1.5~\text{eV}\)

2. \(-1.6~\text{eV}\)

3. \(-1.3~\text{eV}\)

4. \(-1.4~\text{eV}\)

Subtopic: Â Bohr's Model of Atom |

Â 80%

From NCERT

NEET - 2023

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Let \(R_1\) be the radius of the second stationary orbit and \(R_2\) be the radius of the fourth stationary orbit of an electron in Bohr's model. The ratio \(\dfrac{R_1}{R_2}\) is:

1. \(0.25\)

2. \(0.5\)

3. \(2\)

4. \(4\)

1. \(0.25\)

2. \(0.5\)

3. \(2\)

4. \(4\)

Subtopic: Â Bohr's Model of Atom |

Â 78%

From NCERT

NEET - 2022

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Let \(L_1\) and \(L_2\) be the orbital angular momentum of an electron in the first and second excited states of the hydrogen atom, respectively. According to Bohr's model, the ratio \(L_1:L_2\) is:

1. \(1:2\)

2. \(2:1\)

3. \(3:2\)

4. \(2:3\)

Subtopic: Â Bohr's Model of Atom |

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From NCERT

NEET - 2022

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Let \(T_1\) and \(T_2\) be the energy of an electron in the first and second excited states of hydrogen atom, respectively. According to Bohr's model of an atom, the ratio \(T_1:T_2\) is:

1. \(9:4\)

2. \(1:4\)

3. \(4:1\)

4. \(4:9\)

1. \(9:4\)

2. \(1:4\)

3. \(4:1\)

4. \(4:9\)

Subtopic: Â Bohr's Model of Atom |

Â 64%

From NCERT

NEET - 2022

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Match List I with List II.

Choose the correct answer from the options given below:

1. \(\mathrm{A - III, B - IV, C - II, D - I}\)

2. \(\mathrm{A - IV, B - III, C - I, D - II}\)

3. \(\mathrm{A - I, B - II, C - III, D - IV}\)

4. \(\mathrm{A - II, B - I, C - IV, D - III}\)

List I(Spectral Lines of Hydrogen for transitions from) |
List II(Wavelength (nm)) |
||

\(\mathrm{A.}\) | \(n_2=3\) to \(n_1=2\) | \(\mathrm{I.}\) | \(410.2\) |

\(\mathrm{B.}\) | \(n_2=4\) to \(n_1=2\) | \(\mathrm{II.}\) | \(434.1\) |

\(\mathrm{C.}\) | \(n_2=5\) to \(n_1=2\) | \(\mathrm{III.}\) | \(656.3\) |

\(\mathrm{D.}\) | \(n_2=6\) to \(n_1=2\) | \(\mathrm{IV.}\) | \(486.1\) |

Choose the correct answer from the options given below:

1. \(\mathrm{A - III, B - IV, C - II, D - I}\)

2. \(\mathrm{A - IV, B - III, C - I, D - II}\)

3. \(\mathrm{A - I, B - II, C - III, D - IV}\)

4. \(\mathrm{A - II, B - I, C - IV, D - III}\)

Subtopic: Â Spectral Series |

Â 59%

From NCERT

NEET - 2024

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Given below are two statements:

In the light of the above statements, choose the most appropriate answer from the options given below:

Statement I: |
Atoms are electrically neutral as they contain equal number of positive and negative charges. |

Statement II: |
Atoms of each element are stable and emit their characteristic spectrum. |

In the light of the above statements, choose the most appropriate answer from the options given below:

1. | Both Statement I and Statement II are incorrect. |

2. | Statement I is correct but Statement II is incorrect. |

3. | Statement I is incorrect but Statement II is correct. |

4. | Both Statement I and Statement II are correct. |

Subtopic: Â Spectral Series |

From NCERT

NEET - 2024

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