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# Given below are two statements: 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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Match List-I with List-II
 List-I (Series) List-II (Wave number in cm–1) A. Balmer series I. $$R\left(\dfrac{1}{1^2}-\dfrac{1}{n^2}\right)$$ B. Lyman series II. $$R\left(\dfrac{1}{4^2}-\dfrac{1}{n^2}\right)$$ C. Brackett series III. $$R\left(\dfrac{1}{5^2}-\dfrac{1}{n^2}\right)$$ D. Pfund series IV. $$R\left(\dfrac{1}{2^2}-\dfrac{1}{n^2}\right)$$

Choose the correct answer from the options given below
1. A-I, B-IV, C-III, D-II
2. A-II, B-III, C-IV, D-I
3. A-IV, B-I, C-II, D-III
4. A-III, B-II, C-I, D-IV
Subtopic: Â Spectral Series |
Â 80%
From NCERT
NEET - 2024
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Match List I with List II.
 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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The spectral series which corresponds to the electronic transition from the levels $$\mathrm{n}_{2}=5,6,\ldots$$ to the level $$\mathrm{n}_{1}=4\mathrm~$$ is:
1. Pfund series
2. Brackett series
3. Lyman series
4. Balmer series
Subtopic: Â Spectral Series |
Â 80%
From NCERT
NEET - 2024
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Some energy levels of a molecule are shown in the figure with their wavelengths of transitions. Then:

1. $$\lambda_{3}>\lambda_{2},\lambda_{1}=2\lambda_{2}$$
2. $$\lambda_{3}>\lambda_{2},\lambda_{1}=4\lambda_{2}$$
3. $$\lambda_{1}>\lambda_{2},\lambda_{2}=2\lambda_{3}$$
4. $$\lambda_{2}>\lambda_{1},\lambda_{2}=2\lambda_{3}$$
Subtopic: Â Spectral Series |
Â 62%
From NCERT
NEET - 2024
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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. $$-1.4~\text{eV}$$
Subtopic: Â Bohr's Model of Atom |
Â 80%
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 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. $$3.4~\text{eV}$$
Subtopic: Â Bohr's Model of Atom |
Â 58%
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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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. $$9\lambda$$
Subtopic: Â Spectral Series |
Â 59%
From NCERT
NEET - 2023