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In hydrogen spectrum, the shortest wavelength in the Balmer series is \(\lambda\). The shortest wavelength in the Bracket series is:

1. \(16\lambda\)

2. \(2\lambda\)

3. \(4\lambda\)

4. \(9\lambda\)

1. \(16\lambda\)

2. \(2\lambda\)

3. \(4\lambda\)

4. \(9\lambda\)

Subtopic: Various Atomic Models |

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NEET - 2023

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

1. \(4.77~ \mathring{A}\)

2. \(0.53~ \mathring{A}\)

3. \(1.06~ \mathring{A}\)

4. \(1.59~ \mathring{A}\)

1. \(4.77~ \mathring{A}\)

2. \(0.53~ \mathring{A}\)

3. \(1.06~ \mathring{A}\)

4. \(1.59~ \mathring{A}\)

Subtopic: Bohr's Model of Atom |

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NEET - 2023

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

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

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

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

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

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

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

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

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

Subtopic: Bohr's Model of Atom |

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: Spectral Series |

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From NCERT

NEET - 2023

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

1. \(-1.5\) eV

2. \(-1.6\) eV

3. \(-1.3\) eV

4. \(-1.4\) eV

1. \(-1.5\) eV

2. \(-1.6\) eV

3. \(-1.3\) eV

4. \(-1.4\) eV

Subtopic: Bohr's Model of Atom |

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From NCERT

NEET - 2023

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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: Bohr's Model of Atom |

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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: Bohr's Model of Atom |

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From NCERT

NEET - 2022

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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 \(\frac{R_1}{R_2}\) is:

1. \(0.25\)

2. \(0.5\)

3. \(2\)

4. \(4\)

1. \(0.25\)

2. \(0.5\)

3. \(2\)

4. \(4\)

Subtopic: Bohr's Model of Atom |

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From NCERT

NEET - 2022

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For which one of the following Bohr model is not valid?

1. Singly ionised helium atom $\left(H{e}^{+}\right)$

2. Deuteron atom

3. Singly ionised neon atom $\left(N{e}^{+}\right)$

4. Hydrogen atom

Subtopic: Bohr's Model of Atom |

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From NCERT

NEET - 2020

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The total energy of an electron in the ${n}^{th}$ stationary orbit of the hydrogen atom can be obtained by:

1. ${E}_{n}$ $=$ $\frac{13.6}{{n}^{2}}$ $eV$

2. ${E}_{n}$ $=$ $$ $-\frac{13.6}{{n}^{2}}$ $eV$

3. ${E}_{n}$ $=$ $-$ $\frac{1.36}{{n}^{2}}$ $eV$

4. ${E}_{n}$ $=$ $-13.6\times {n}^{2}$ $eV$

Subtopic: Bohr's Model of Atom |

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