01. Atomic Models
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Structure of Atom

238668 The position of both an electron and helium atom is known within $1.0 \mathrm{~nm}$. The momentum of the electron is known within $5.0 \times 10^{-26} \mathrm{~kg}$ $\mathrm{ms}^{-1}$. The minimum uncertainty in the measurement of the momentum of the helium atom is

1 $7.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
2 $5.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
3 $8.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
4 $6.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
AIIMS-1994
Structure of Atom

238673 The energy of an electron in $n^{\text {th }}$ orbit of hydrogen atom is

1 $\frac{13.6}{\mathrm{n}^4} \mathrm{eV}$
2 $\frac{13.6}{\mathrm{n}^3} \mathrm{eV}$
3 $-\frac{13.6}{\mathrm{n}^2} \mathrm{eV}$
4 $\frac{13.6}{\mathrm{n}} \mathrm{eV}$
CG PET -2007
Structure of Atom

238675 Given below are two statements:
Statement-I Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement-II Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle. In the light of the above statements, choose the most appropriate answer from the options given below:

1 Statement I is false but statement II is true.
2 Statement I is true but statement II is false.
3 Both statement I and statement II are false.
4 Both statement I and statement II are true.
[JEE Main 2021
Structure of Atom

238676 If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been

1 All of the $\alpha$-particles pass through the gold foil without decrease in speed.
2 $\alpha$-particles are deflected over a wide range of angles
3 all $\alpha$-particles get bounced back by $180^{\circ}$.
4 $\alpha$-particles pass through the gold foil deflected by small angles and with reduced speed.
[JEE Main 2021
Structure of Atom

238677 For d-electron, the orbital angular momentum is

1 $\frac{\sqrt{6} \mathrm{~h}}{2 \pi}$
2 $\frac{\sqrt{2} \mathrm{~h}}{2 \pi}$
3 $\mathrm{h} / 2 \pi$
4 $2 \mathrm{~h} / \pi$
J and K CET-(2004)
Join With Us for More Updates
Structure of Atom

238668 The position of both an electron and helium atom is known within $1.0 \mathrm{~nm}$. The momentum of the electron is known within $5.0 \times 10^{-26} \mathrm{~kg}$ $\mathrm{ms}^{-1}$. The minimum uncertainty in the measurement of the momentum of the helium atom is

1 $7.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
2 $5.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
3 $8.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
4 $6.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
AIIMS-1994
Structure of Atom

238673 The energy of an electron in $n^{\text {th }}$ orbit of hydrogen atom is

1 $\frac{13.6}{\mathrm{n}^4} \mathrm{eV}$
2 $\frac{13.6}{\mathrm{n}^3} \mathrm{eV}$
3 $-\frac{13.6}{\mathrm{n}^2} \mathrm{eV}$
4 $\frac{13.6}{\mathrm{n}} \mathrm{eV}$
CG PET -2007
Structure of Atom

238675 Given below are two statements:
Statement-I Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement-II Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle. In the light of the above statements, choose the most appropriate answer from the options given below:

1 Statement I is false but statement II is true.
2 Statement I is true but statement II is false.
3 Both statement I and statement II are false.
4 Both statement I and statement II are true.
[JEE Main 2021
Structure of Atom

238676 If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been

1 All of the $\alpha$-particles pass through the gold foil without decrease in speed.
2 $\alpha$-particles are deflected over a wide range of angles
3 all $\alpha$-particles get bounced back by $180^{\circ}$.
4 $\alpha$-particles pass through the gold foil deflected by small angles and with reduced speed.
[JEE Main 2021
Structure of Atom

238677 For d-electron, the orbital angular momentum is

1 $\frac{\sqrt{6} \mathrm{~h}}{2 \pi}$
2 $\frac{\sqrt{2} \mathrm{~h}}{2 \pi}$
3 $\mathrm{h} / 2 \pi$
4 $2 \mathrm{~h} / \pi$
J and K CET-(2004)
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NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Structure of Atom

238668 The position of both an electron and helium atom is known within $1.0 \mathrm{~nm}$. The momentum of the electron is known within $5.0 \times 10^{-26} \mathrm{~kg}$ $\mathrm{ms}^{-1}$. The minimum uncertainty in the measurement of the momentum of the helium atom is

1 $7.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
2 $5.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
3 $8.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
4 $6.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
AIIMS-1994
Structure of Atom

238673 The energy of an electron in $n^{\text {th }}$ orbit of hydrogen atom is

1 $\frac{13.6}{\mathrm{n}^4} \mathrm{eV}$
2 $\frac{13.6}{\mathrm{n}^3} \mathrm{eV}$
3 $-\frac{13.6}{\mathrm{n}^2} \mathrm{eV}$
4 $\frac{13.6}{\mathrm{n}} \mathrm{eV}$
CG PET -2007
Structure of Atom

238675 Given below are two statements:
Statement-I Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement-II Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle. In the light of the above statements, choose the most appropriate answer from the options given below:

1 Statement I is false but statement II is true.
2 Statement I is true but statement II is false.
3 Both statement I and statement II are false.
4 Both statement I and statement II are true.
[JEE Main 2021
Structure of Atom

238676 If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been

1 All of the $\alpha$-particles pass through the gold foil without decrease in speed.
2 $\alpha$-particles are deflected over a wide range of angles
3 all $\alpha$-particles get bounced back by $180^{\circ}$.
4 $\alpha$-particles pass through the gold foil deflected by small angles and with reduced speed.
[JEE Main 2021
Structure of Atom

238677 For d-electron, the orbital angular momentum is

1 $\frac{\sqrt{6} \mathrm{~h}}{2 \pi}$
2 $\frac{\sqrt{2} \mathrm{~h}}{2 \pi}$
3 $\mathrm{h} / 2 \pi$
4 $2 \mathrm{~h} / \pi$
J and K CET-(2004)
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Structure of Atom

238668 The position of both an electron and helium atom is known within $1.0 \mathrm{~nm}$. The momentum of the electron is known within $5.0 \times 10^{-26} \mathrm{~kg}$ $\mathrm{ms}^{-1}$. The minimum uncertainty in the measurement of the momentum of the helium atom is

1 $7.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
2 $5.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
3 $8.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
4 $6.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
AIIMS-1994
Structure of Atom

238673 The energy of an electron in $n^{\text {th }}$ orbit of hydrogen atom is

1 $\frac{13.6}{\mathrm{n}^4} \mathrm{eV}$
2 $\frac{13.6}{\mathrm{n}^3} \mathrm{eV}$
3 $-\frac{13.6}{\mathrm{n}^2} \mathrm{eV}$
4 $\frac{13.6}{\mathrm{n}} \mathrm{eV}$
CG PET -2007
Structure of Atom

238675 Given below are two statements:
Statement-I Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement-II Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle. In the light of the above statements, choose the most appropriate answer from the options given below:

1 Statement I is false but statement II is true.
2 Statement I is true but statement II is false.
3 Both statement I and statement II are false.
4 Both statement I and statement II are true.
[JEE Main 2021
Structure of Atom

238676 If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been

1 All of the $\alpha$-particles pass through the gold foil without decrease in speed.
2 $\alpha$-particles are deflected over a wide range of angles
3 all $\alpha$-particles get bounced back by $180^{\circ}$.
4 $\alpha$-particles pass through the gold foil deflected by small angles and with reduced speed.
[JEE Main 2021
Structure of Atom

238677 For d-electron, the orbital angular momentum is

1 $\frac{\sqrt{6} \mathrm{~h}}{2 \pi}$
2 $\frac{\sqrt{2} \mathrm{~h}}{2 \pi}$
3 $\mathrm{h} / 2 \pi$
4 $2 \mathrm{~h} / \pi$
J and K CET-(2004)
Join With Us for More Updates
Structure of Atom

238668 The position of both an electron and helium atom is known within $1.0 \mathrm{~nm}$. The momentum of the electron is known within $5.0 \times 10^{-26} \mathrm{~kg}$ $\mathrm{ms}^{-1}$. The minimum uncertainty in the measurement of the momentum of the helium atom is

1 $7.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
2 $5.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
3 $8.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
4 $6.0 \times 10^{-26} \mathrm{~kg} \mathrm{~ms}^{-1}$
AIIMS-1994
Structure of Atom

238673 The energy of an electron in $n^{\text {th }}$ orbit of hydrogen atom is

1 $\frac{13.6}{\mathrm{n}^4} \mathrm{eV}$
2 $\frac{13.6}{\mathrm{n}^3} \mathrm{eV}$
3 $-\frac{13.6}{\mathrm{n}^2} \mathrm{eV}$
4 $\frac{13.6}{\mathrm{n}} \mathrm{eV}$
CG PET -2007
Structure of Atom

238675 Given below are two statements:
Statement-I Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement-II Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle. In the light of the above statements, choose the most appropriate answer from the options given below:

1 Statement I is false but statement II is true.
2 Statement I is true but statement II is false.
3 Both statement I and statement II are false.
4 Both statement I and statement II are true.
[JEE Main 2021
Structure of Atom

238676 If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been

1 All of the $\alpha$-particles pass through the gold foil without decrease in speed.
2 $\alpha$-particles are deflected over a wide range of angles
3 all $\alpha$-particles get bounced back by $180^{\circ}$.
4 $\alpha$-particles pass through the gold foil deflected by small angles and with reduced speed.
[JEE Main 2021
Structure of Atom

238677 For d-electron, the orbital angular momentum is

1 $\frac{\sqrt{6} \mathrm{~h}}{2 \pi}$
2 $\frac{\sqrt{2} \mathrm{~h}}{2 \pi}$
3 $\mathrm{h} / 2 \pi$
4 $2 \mathrm{~h} / \pi$
J and K CET-(2004)