# JEE Advanced > Structure of Atom

Explore popular questions from Structure of Atom for JEE Advanced. This collection covers Structure of Atom previous year JEE Advanced questions hand picked by experienced teachers.

Physics
Chemistry
Mathematics
Q 1.

Correct4

Incorrect-1

Rutherford's experiment on scattering of {tex} { \alpha } {/tex} -particles showed for the first time that the atom has

A

electrons

B

protons

nucleus

D

neutrons

##### Explanation

Q 2.

Correct4

Incorrect-1

The wavelength of a spectral line for an electronic transition is inversely related to:

A

the number of electrons undergoing the transition

B

the nuclear charge of the atom

the difference in the energy of the energy levels involved in the transition

D

the velocity of the electron undergoing the transition.

##### Explanation

Q 3.

Correct4

Incorrect-1

The orbital diagram in which the Aufbau principle is violated is:

A

C

D

##### Explanation

Q 4.

Correct4

Incorrect-1

The correct ground state electronic configuration of chromium atom is:

{tex} [ \mathrm { Ar } ] 3 d ^ { 5 } 4 s ^ { 1 } {/tex}

B

{tex} [ \text { Ar } ] 3 d ^ { 4 } 4 s ^ { 2 } {/tex}

C

{tex} [\text {Ar} ] 3 d ^ { 6 } 4 s ^ { 0 } {/tex}

D

{tex} [ \text {Ar} ] 4 d ^ { 5 } 4 s ^ { 1 } {/tex}

##### Explanation

Q 5.

Correct4

Incorrect-1

The correct set of quantum numbers for the unpaired electron of chlorine atom is:

A

{tex} n : 2,\ l : 1,\ m : 0{/tex}

B

{tex} n : 2, \ l : 1, \ m : 1 {/tex}

{tex} n : 3 , \ l : 1 , \ m : 1 {/tex}

D

{tex} n : 3 , \ l : 0 , \ m : 0 {/tex}

##### Explanation

Q 6.

Correct4

Incorrect-1

Which of the following does not characterise {tex} X {/tex}-rays?

A

B

It causes ZnS to fluorescence

Deflected by electric and magnetic fields

D

Have wavelengths shorter than ultraviolet rays

##### Explanation

Q 7.

Correct4

Incorrect-1

A {tex} 3 p {/tex} orbital has:

A

two non spherical nodes

B

two spherical nodes

one spherical & one non spherical node

D

one spherical and two non spherical nodes

##### Explanation

Q 8.

Correct4

Incorrect-1

The orbital angular momentum of an electron in 2s orbital is:

A

{tex} + \frac { 1 } { 2 } \cdot \frac { h } { 2 \pi } {/tex}

{tex}\mathrm {Zero}{/tex}

C

{tex} \frac { h } { 2 \pi } {/tex}

D

{tex} \sqrt { 2 } \cdot \frac { h } { 2 \pi } {/tex}

##### Explanation

Q 9.

Correct4

Incorrect-1

For a {tex} d {/tex}-electron, the orbital angular momentum is

{tex} \sqrt { 6 } ( h / 2 \pi ) {/tex}

B

{tex} \sqrt { 2 } ( h / 2 \pi ) {/tex}

C

{tex} ( h / 2 \pi ) {/tex}

D

{tex} 2 ( h / 2 \pi ) {/tex}

##### Explanation

Q 10.

Correct4

Incorrect-1

The electrons, identified by quantum numbers {tex} n {/tex} and {tex} l , {/tex} (i) {tex} n = 4 , l = 1 , ( \text { ii } ) n = 4 , l = 0 , ( \text { iii) } n = 3 , l = 2 , \text { and (iv) } n = 3, {/tex} {tex} l = 1 {/tex} can be placed in order of increasing energy, from the lowest to highest, as

{tex} ( \mathrm { iv } ) < ( \mathrm { ii } ) < ( \mathrm { iii } ) < ( \mathrm { i } ) {/tex}

B

{tex}(\mathrm { ii }) < ( \mathrm { iv } ) < ( \mathrm { i } ) < ( \mathrm { iii } ) {/tex}

C

{tex} ( \text {i} ) < ( \text { iii } ) < ( \text {ii} ) < ( \text {iv} ) {/tex}

D

{tex} ( \text { iii) } < ( \text {i} ) < ( \text {iv} ) < ( \text {ii} ) {/tex}

##### Explanation

Q 11.

Correct4

Incorrect-1

The number of nodal planes in a {tex} p _ { x } {/tex} orbital is

one

B

two

C

three

D

Zero

##### Explanation

Q 12.

Correct4

Incorrect-1

The wavelength associated with a golf ball weighing {tex} 200\ \mathrm { g } {/tex} and moving at a speed of {tex} 5\ \mathrm { m } / \mathrm { h } {/tex} is of the order

{tex} 10 ^ { - 10 } \mathrm { m } {/tex}

B

{tex} 10 ^ { - 20 } \mathrm { m } {/tex}

C

{tex} 10 ^ { - 30 } \mathrm { m } {/tex}

D

{tex} 10 ^ { - 40 } \mathrm { m } {/tex}

##### Explanation

Q 13.

Correct4

Incorrect-1

The quantum numbers {tex} + 1 / 2 {/tex} and {tex} - 1 / 2 {/tex} for the electron spin represent

A

rotation of the electron in clockwise and anticlockwise direction respectively

B

rotation of the electron in anticlockwise and clockwise direction respectively

C

magnetic moment of the electron pointing up and down respectively

two quantum mechanical spin states which have no classical analogue

##### Explanation

Q 14.

Correct4

Incorrect-1

Rurtherford's experiment, which established the nuclear model of the atom, used a beam of

A

{tex}\beta{/tex}-particles, which impinged on a metal foil and got absorbed

B

{tex}\gamma{/tex}-rays, which impinged on a metal foil and ejected electrons

C

helium atoms, which impinged on a metal foil and got scattered

helium nuclei, which impinged on a metal foil and got scattered

##### Explanation

Q 15.

Correct4

Incorrect-1

If the nitrogen atom has electronic configuration {tex} 1 s ^ { 7 } , {/tex} it would have energy lower than that of the normal ground state configuration {tex} 1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 3 } , {/tex} because the electrons would be closer to the nucleus. Yet {tex} 1 s ^ { 7 } {/tex} is not observed because it violates.

A

Heisenberg uncertainty principle

B

Hund's rule

Pauli exclusion principle

D

Bohr postulate of stationary orbits