Bohr's Model for Hydrogen Atom
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CHXI02:STRUCTURE OF ATOM

307210 The radius of an orbit of H atom is \({\rm{8}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 10}}}}{\rm{m}}\). The angular momentum of the electron in the same orbit is

1 \(\frac{{\rm{h}}}{{{\rm{2\pi }}}}\)
2 \(\frac{{\rm{h}}}{{\rm{\pi }}}\)
3 \(\frac{{{\rm{2h}}}}{{\rm{\pi }}}\)
4 \(\frac{{{\rm{3h}}}}{{\rm{\pi }}}\)
CHXI02:STRUCTURE OF ATOM

307211 The radius of the first Bohr orbit of the \(\mathrm{H}\)-atom is \(\mathrm{r}\). Then, the radius of the first orbit of \(\mathrm{Li}^{2+}\) will be

1 \(\mathrm{r} / 9\)
2 \(\mathrm{r} / 3\)
3 \(3 \mathrm{r}\)
4 \(9 \mathrm{r}\)
CHXI02:STRUCTURE OF ATOM

307212 Bohr’s model can explain

1 The spectrum of only hydrogen atom
2 The spectrum of the atoms of all the elements
3 The spectrum of only sodium atom
4 The spectrum of atomic or ionic species having one electron
CHXI02:STRUCTURE OF ATOM

307213 Assertion :
In Sommerfelds model, circular orbit is possible for the electron in \(\mathrm{K}\) shell.
Reason :
Electron present in \(\mathrm{K}\) shell corresponds to principal quantum number \(\mathrm{n}=1\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
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CHXI02:STRUCTURE OF ATOM

307210 The radius of an orbit of H atom is \({\rm{8}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 10}}}}{\rm{m}}\). The angular momentum of the electron in the same orbit is

1 \(\frac{{\rm{h}}}{{{\rm{2\pi }}}}\)
2 \(\frac{{\rm{h}}}{{\rm{\pi }}}\)
3 \(\frac{{{\rm{2h}}}}{{\rm{\pi }}}\)
4 \(\frac{{{\rm{3h}}}}{{\rm{\pi }}}\)
CHXI02:STRUCTURE OF ATOM

307211 The radius of the first Bohr orbit of the \(\mathrm{H}\)-atom is \(\mathrm{r}\). Then, the radius of the first orbit of \(\mathrm{Li}^{2+}\) will be

1 \(\mathrm{r} / 9\)
2 \(\mathrm{r} / 3\)
3 \(3 \mathrm{r}\)
4 \(9 \mathrm{r}\)
CHXI02:STRUCTURE OF ATOM

307212 Bohr’s model can explain

1 The spectrum of only hydrogen atom
2 The spectrum of the atoms of all the elements
3 The spectrum of only sodium atom
4 The spectrum of atomic or ionic species having one electron
CHXI02:STRUCTURE OF ATOM

307213 Assertion :
In Sommerfelds model, circular orbit is possible for the electron in \(\mathrm{K}\) shell.
Reason :
Electron present in \(\mathrm{K}\) shell corresponds to principal quantum number \(\mathrm{n}=1\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
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CHXI02:STRUCTURE OF ATOM

307210 The radius of an orbit of H atom is \({\rm{8}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 10}}}}{\rm{m}}\). The angular momentum of the electron in the same orbit is

1 \(\frac{{\rm{h}}}{{{\rm{2\pi }}}}\)
2 \(\frac{{\rm{h}}}{{\rm{\pi }}}\)
3 \(\frac{{{\rm{2h}}}}{{\rm{\pi }}}\)
4 \(\frac{{{\rm{3h}}}}{{\rm{\pi }}}\)
CHXI02:STRUCTURE OF ATOM

307211 The radius of the first Bohr orbit of the \(\mathrm{H}\)-atom is \(\mathrm{r}\). Then, the radius of the first orbit of \(\mathrm{Li}^{2+}\) will be

1 \(\mathrm{r} / 9\)
2 \(\mathrm{r} / 3\)
3 \(3 \mathrm{r}\)
4 \(9 \mathrm{r}\)
CHXI02:STRUCTURE OF ATOM

307212 Bohr’s model can explain

1 The spectrum of only hydrogen atom
2 The spectrum of the atoms of all the elements
3 The spectrum of only sodium atom
4 The spectrum of atomic or ionic species having one electron
CHXI02:STRUCTURE OF ATOM

307213 Assertion :
In Sommerfelds model, circular orbit is possible for the electron in \(\mathrm{K}\) shell.
Reason :
Electron present in \(\mathrm{K}\) shell corresponds to principal quantum number \(\mathrm{n}=1\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
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CHXI02:STRUCTURE OF ATOM

307210 The radius of an orbit of H atom is \({\rm{8}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 10}}}}{\rm{m}}\). The angular momentum of the electron in the same orbit is

1 \(\frac{{\rm{h}}}{{{\rm{2\pi }}}}\)
2 \(\frac{{\rm{h}}}{{\rm{\pi }}}\)
3 \(\frac{{{\rm{2h}}}}{{\rm{\pi }}}\)
4 \(\frac{{{\rm{3h}}}}{{\rm{\pi }}}\)
CHXI02:STRUCTURE OF ATOM

307211 The radius of the first Bohr orbit of the \(\mathrm{H}\)-atom is \(\mathrm{r}\). Then, the radius of the first orbit of \(\mathrm{Li}^{2+}\) will be

1 \(\mathrm{r} / 9\)
2 \(\mathrm{r} / 3\)
3 \(3 \mathrm{r}\)
4 \(9 \mathrm{r}\)
CHXI02:STRUCTURE OF ATOM

307212 Bohr’s model can explain

1 The spectrum of only hydrogen atom
2 The spectrum of the atoms of all the elements
3 The spectrum of only sodium atom
4 The spectrum of atomic or ionic species having one electron
CHXI02:STRUCTURE OF ATOM

307213 Assertion :
In Sommerfelds model, circular orbit is possible for the electron in \(\mathrm{K}\) shell.
Reason :
Electron present in \(\mathrm{K}\) shell corresponds to principal quantum number \(\mathrm{n}=1\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.